Meteorologia spaziale

Velocità del vento solare Vento solare dei campi magnetici Apice radioflusso a 10.7 cm
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WARNING
Geomagnetic K-index of 4 expected
Issued: 19.05.2024 13:20 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 May 19 1320 UTC
Valid To: 2024 May 19 2359 UTC
Warning Condition: Onset

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WATCH
Geomagnetic Storm Category G1 Predicted
Issued: 18.05.2024 19:52 UTC
Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
May 19: None (Below G1) May 20: G1 (Minor) May 21: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 18.05.2024 05:56 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1883
Valid From: 2024 May 17 1305 UTC
Now Valid Until: 2024 May 18 1200 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

EXTENDED WARNING
Geomagnetic K-Index of 6 expected
Emesso: 17.05.2024 23:01 UTC
Geomagnetic K-Index of 6 expected
Extension to Serial Number: 525
Valid From: 2024 May 17 1901 UTC
Now Valid Until: 2024 May 18 0600 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 17.05.2024 22:35 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 17 2230 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Emesso: 17.05.2024 21:56 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4613
Valid From: 2024 May 17 1300 UTC
Now Valid Until: 2024 May 18 1200 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Emesso: 17.05.2024 21:56 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1882
Valid From: 2024 May 17 1305 UTC
Now Valid Until: 2024 May 18 0600 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Type IV Radio Emission
Emesso: 17.05.2024 21:43 UTC
Type IV Radio Emission
Begin Time: 2024 May 17 2111 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

ALERT
Type II Radio Emission
Emesso: 17.05.2024 21:39 UTC
Type II Radio Emission
Begin Time: 2024 May 17 2103 UTC
Estimated Velocity: 425 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

SUMMARY
X-ray Event exceeded M5
Emesso: 17.05.2024 21:33 UTC
X-ray Event exceeded M5
Begin Time: 2024 May 17 2033 UTC
Maximum Time: 2024 May 17 2108 UTC
End Time: 2024 May 17 2126 UTC
X-ray Class: M7.2
Optical Class: 2b
Location: S13E50
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
X-Ray Flux exceeded M5
Emesso: 17.05.2024 21:05 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 17 2102 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

ALERT
Geomagnetic K-index of 6
Emesso: 17.05.2024 19:29 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 17 1928 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

WARNING
Geomagnetic K-Index of 6 expected
Emesso: 17.05.2024 19:02 UTC
Geomagnetic K-Index of 6 expected
Valid From: 2024 May 17 1901 UTC
Valid To: 2024 May 17 2359 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 17.05.2024 18:34 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 17 1834 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Emesso: 17.05.2024 17:49 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1881
Valid From: 2024 May 17 1305 UTC
Now Valid Until: 2024 May 17 2359 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Emesso: 17.05.2024 17:49 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4612
Valid From: 2024 May 17 1300 UTC
Now Valid Until: 2024 May 18 0300 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

ALERT
Geomagnetic K-index of 5
Emesso: 17.05.2024 17:05 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 17 1701 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 4
Emesso: 17.05.2024 16:45 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 May 17 1639 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

SUMMARY
Geomagnetic Sudden Impulse
Emesso: 17.05.2024 13:42 UTC
Geomagnetic Sudden Impulse
Observed: 2024 May 17 1325 UTC
Deviation: 11 nT
Station: BOU

WARNING
Geomagnetic K-index of 5 expected
Emesso: 17.05.2024 13:04 UTC
Geomagnetic K-index of 5 expected
Valid From: 2024 May 17 1305 UTC
Valid To: 2024 May 17 1800 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

WARNING
Geomagnetic K-index of 4 expected
Emesso: 17.05.2024 13:00 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 May 17 1300 UTC
Valid To: 2024 May 17 2100 UTC
Warning Condition: Onset

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WARNING
Geomagnetic Sudden Impulse expected
Emesso: 17.05.2024 12:57 UTC
Geomagnetic Sudden Impulse expected
Valid From: 2024 May 17 1315 UTC
Valid To: 2024 May 17 1345 UTC
IP Shock Passage Observed: 2024 May 17 1245 UTC

SUMMARY
Proton Event 10MeV Integral Flux exceeded 10pfu
Emesso: 17.05.2024 11:37 UTC
Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2024 May 13 1400 UTC
Maximum Time: 2024 May 14 0520 UTC
End Time: 2024 May 16 1455 UTC
Maximum 10MeV Flux: 121 pfu
NOAA Scale: S2 - Moderate

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Emesso: 16.05.2024 17:37 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4610
Valid From: 2024 May 16 0456 UTC
Now Valid Until: 2024 May 17 0600 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

ALERT
Geomagnetic K-index of 5
Emesso: 16.05.2024 15:08 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 16 1459 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

EXTENDED WARNING
Proton 10MeV Integral Flux above 10pfu expected
Emesso: 16.05.2024 14:22 UTC
Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 561
Valid From: 2024 May 13 1328 UTC
Now Valid Until: 2024 May 16 2359 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

ALERT
Geomagnetic K-index of 5
Emesso: 16.05.2024 11:50 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 16 1143 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 6
Emesso: 16.05.2024 08:38 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 16 0834 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

WARNING
Geomagnetic K-Index of 6 expected
Emesso: 16.05.2024 08:22 UTC
Geomagnetic K-Index of 6 expected
Valid From: 2024 May 16 0821 UTC
Valid To: 2024 May 16 1500 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 16.05.2024 07:39 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 16 0733 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

SUMMARY
Geomagnetic Sudden Impulse
Emesso: 16.05.2024 06:43 UTC
Geomagnetic Sudden Impulse
Observed: 2024 May 16 0620 UTC
Deviation: 146 nT
Station: Sitka

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Emesso: 16.05.2024 06:38 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4609
Valid From: 2024 May 16 0456 UTC
Now Valid Until: 2024 May 16 1800 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WARNING
Geomagnetic K-index of 5 expected
Emesso: 16.05.2024 06:33 UTC
Geomagnetic K-index of 5 expected
Valid From: 2024 May 16 0632 UTC
Valid To: 2024 May 16 1800 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 4
Emesso: 16.05.2024 06:28 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 May 16 0620 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WARNING
Geomagnetic Sudden Impulse expected
Emesso: 16.05.2024 05:26 UTC
Geomagnetic Sudden Impulse expected
Valid From: 2024 May 16 0545 UTC
Valid To: 2024 May 16 0615 UTC
IP Shock Passage Observed: 2024 May 16 0515 UTC

WARNING
Geomagnetic K-index of 4 expected
Emesso: 16.05.2024 04:57 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 May 16 0456 UTC
Valid To: 2024 May 16 1200 UTC
Warning Condition: Onset

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

EXTENDED WARNING
Proton 10MeV Integral Flux above 10pfu expected
Emesso: 15.05.2024 21:46 UTC
Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 560
Valid From: 2024 May 13 1328 UTC
Now Valid Until: 2024 May 16 1500 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

ALERT
Type II Radio Emission
Emesso: 15.05.2024 20:53 UTC
Type II Radio Emission
Begin Time: 2024 May 15 2037 UTC
Estimated Velocity: 680 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Emesso: 15.05.2024 15:33 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2024 May 15 1525 UTC
Station: GOES16

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

SUMMARY
X-ray Event exceeded X1
Emesso: 15.05.2024 15:13 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 15 1420 UTC
Maximum Time: 2024 May 15 1438 UTC
End Time: 2024 May 15 1451 UTC
X-ray Class: X2.9
Location: S07E90
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
Type IV Radio Emission
Emesso: 15.05.2024 15:09 UTC
Type IV Radio Emission
Begin Time: 2024 May 15 1427 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

ALERT
Type II Radio Emission
Emesso: 15.05.2024 15:08 UTC
Type II Radio Emission
Begin Time: 2024 May 15 1427 UTC
Estimated Velocity: 1064 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

ALERT
X-Ray Flux exceeded M5
Emesso: 15.05.2024 14:27 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 15 1424 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

SUMMARY
Proton Event 10MeV Integral Flux exceeded 100pfu
Emesso: 15.05.2024 13:29 UTC
Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2024 May 14 0315 UTC
Maximum Time: 2024 May 14 0505 UTC
End Time: 2024 May 14 0650 UTC
Maximum 10MeV Flux: 121 pfu
NOAA Scale: S2 - Moderate

SUMMARY
10cm Radio Burst
Emesso: 15.05.2024 11:49 UTC
10cm Radio Burst
Begin Time: 2024 May 15 1039 UTC
Maximum Time: 2024 May 15 1044 UTC
End Time: 2024 May 15 1048 UTC
Duration: 9 minutes
Peak Flux: 250 sfu
Latest Penticton Noon Flux: 220 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

SUMMARY
X-ray Event exceeded X1
Emesso: 15.05.2024 09:05 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 15 0818 UTC
Maximum Time: 2024 May 15 0837 UTC
End Time: 2024 May 15 0852 UTC
X-ray Class: X3.4
Optical Class: na
Location: S22W90
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
Type IV Radio Emission
Emesso: 15.05.2024 09:03 UTC
Type IV Radio Emission
Begin Time: 2024 May 15 0827 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

SUMMARY
10cm Radio Burst
Emesso: 15.05.2024 08:46 UTC
10cm Radio Burst
Begin Time: 2024 May 15 0830 UTC
Maximum Time: 2024 May 15 0831 UTC
End Time: 2024 May 15 0835 UTC
Duration: 5 minutes
Peak Flux: 450 sfu
Latest Penticton Noon Flux: 220 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

ALERT
X-Ray Flux exceeded M5
Emesso: 15.05.2024 08:32 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 15 0830 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

EXTENDED WARNING
Proton 10MeV Integral Flux above 10pfu expected
Emesso: 14.05.2024 20:16 UTC
Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 559
Valid From: 2024 May 13 1328 UTC
Now Valid Until: 2024 May 15 2359 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

ALERT
Type II Radio Emission
Emesso: 14.05.2024 18:43 UTC
Type II Radio Emission
Begin Time: 2024 May 14 1730 UTC
Estimated Velocity: 610 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

SUMMARY
X-ray Event exceeded X1
Emesso: 14.05.2024 17:16 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 14 1646 UTC
Maximum Time: 2024 May 14 1651 UTC
End Time: 2024 May 14 1702 UTC
X-ray Class: X8.7
Location: S22W90
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
Type II Radio Emission
Emesso: 14.05.2024 17:14 UTC
Type II Radio Emission
Begin Time: 2024 May 14 1653 UTC
Estimated Velocity: 497 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

SUMMARY
10cm Radio Burst
Emesso: 14.05.2024 17:13 UTC
10cm Radio Burst
Begin Time: 2024 May 14 1646 UTC
Maximum Time: 2024 May 14 1647 UTC
End Time: 2024 May 14 1653 UTC
Duration: 7 minutes
Peak Flux: 1100 sfu
Latest Penticton Noon Flux: 215 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

ALERT
Type IV Radio Emission
Emesso: 14.05.2024 17:09 UTC
Type IV Radio Emission
Begin Time: 2024 May 14 1647 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

ALERT
X-Ray Flux exceeded M5
Emesso: 14.05.2024 16:50 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 14 1647 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

ALERT
Type II Radio Emission
Emesso: 14.05.2024 13:14 UTC
Type II Radio Emission
Begin Time: 2024 May 14 1245 UTC
Estimated Velocity: 797 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

SUMMARY
X-ray Event exceeded X1
Emesso: 14.05.2024 13:12 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 14 1240 UTC
Maximum Time: 2024 May 14 1255 UTC
End Time: 2024 May 14 1305 UTC
X-ray Class: X1.2
Location: S21W90
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
X-Ray Flux exceeded M5
Emesso: 14.05.2024 12:52 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 14 1249 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

ALERT
Proton Event 10MeV Integral Flux exceeded 100pfu
Emesso: 14.05.2024 04:17 UTC
Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2024 May 14 0335 UTC
NOAA Scale: S2 - Moderate

Potential Impacts: Radiation - Passengers and crew in high latitude, high altitude flights may experience small, increased radiation exposures.
Spacecraft - Infrequent single-event upsets to satellites are possible.
Radio - Small effects on polar HF (high frequency) propagation resulting in fades at lower frequencies.

ALERT
Type IV Radio Emission
Emesso: 14.05.2024 03:00 UTC
Type IV Radio Emission
Begin Time: 2024 May 14 0220 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

ALERT
Type II Radio Emission
Emesso: 14.05.2024 02:46 UTC
Type II Radio Emission
Begin Time: 2024 May 14 0207 UTC
Estimated Velocity: 447 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

SUMMARY
X-ray Event exceeded X1
Emesso: 14.05.2024 02:36 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 14 0203 UTC
Maximum Time: 2024 May 14 0209 UTC
End Time: 2024 May 14 0219 UTC
X-ray Class: X1.7
Location: S19W87
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

SUMMARY
10cm Radio Burst
Emesso: 14.05.2024 02:20 UTC
10cm Radio Burst
Begin Time: 2024 May 14 0205 UTC
Maximum Time: 2024 May 14 0205 UTC
End Time: 2024 May 14 0206 UTC
Duration: 1 minutes
Peak Flux: 220 sfu
Latest Penticton Noon Flux: 215 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

ALERT
X-Ray Flux exceeded M5
Emesso: 14.05.2024 02:10 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 14 0206 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Emesso: 13.05.2024 23:56 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4607
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 14 2359 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

EXTENDED WARNING
Proton 10MeV Integral Flux above 10pfu expected
Emesso: 13.05.2024 21:27 UTC
Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 558
Valid From: 2024 May 13 1328 UTC
Now Valid Until: 2024 May 14 2359 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

WATCH
Geomagnetic Storm Category G2 Predicted
Emesso: 13.05.2024 21:03 UTC
Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
May 14: G2 (Moderate) May 15: G1 (Minor) May 16: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Emesso: 13.05.2024 14:55 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1878
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 13 2100 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Proton Event 10MeV Integral Flux exceeded 10pfu
Emesso: 13.05.2024 14:08 UTC
Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2024 May 13 1407 UTC
NOAA Scale: S1 - Minor

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

WARNING
Proton 10MeV Integral Flux above 10pfu expected
Emesso: 13.05.2024 13:28 UTC
Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2024 May 13 1328 UTC
Valid To: 2024 May 13 2359 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

SUMMARY
X-ray Event exceeded M5
Emesso: 13.05.2024 11:12 UTC
X-ray Event exceeded M5
Begin Time: 2024 May 13 0848 UTC
Maximum Time: 2024 May 13 0944 UTC
End Time: 2024 May 13 1057 UTC
X-ray Class: M6.6
Location: S20W90
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

SUMMARY
10cm Radio Burst
Emesso: 13.05.2024 10:25 UTC
10cm Radio Burst
Begin Time: 2024 May 13 0917 UTC
Maximum Time: 2024 May 13 0926 UTC
End Time: 2024 May 13 1009 UTC
Duration: 52 minutes
Peak Flux: 1200 sfu
Latest Penticton Noon Flux: 222 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

ALERT
Type IV Radio Emission
Emesso: 13.05.2024 09:50 UTC
Type IV Radio Emission
Begin Time: 2024 May 13 0916 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

ALERT
Type II Radio Emission
Emesso: 13.05.2024 09:49 UTC
Type II Radio Emission
Begin Time: 2024 May 13 0906 UTC
Estimated Velocity: 683 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

ALERT
X-Ray Flux exceeded M5
Emesso: 13.05.2024 09:42 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 13 0939 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

ALERT
Geomagnetic K-index of 6
Emesso: 13.05.2024 04:02 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 13 0355 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 13.05.2024 03:28 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 13 0324 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 6
Emesso: 13.05.2024 02:59 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 13 0259 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

SUMMARY
Proton Event 10MeV Integral Flux exceeded 10pfu
Emesso: 13.05.2024 01:33 UTC
Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2024 May 10 1335 UTC
Maximum Time: 2024 May 10 1745 UTC
End Time: 2024 May 12 1235 UTC
Maximum 10MeV Flux: 207 pfu
NOAA Scale: S2 - Moderate

ALERT
Geomagnetic K-index of 5
Emesso: 13.05.2024 01:20 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 13 0120 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

EXTENDED WARNING
Geomagnetic K-index of 7 or greater expected
Emesso: 12.05.2024 22:43 UTC
Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 106
Valid From: 2024 May 10 1715 UTC
Now Valid Until: 2024 May 13 0600 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 6
Emesso: 12.05.2024 22:38 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 12 2239 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 12.05.2024 22:21 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 12 2220 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

SUMMARY
X-ray Event exceeded X1
Emesso: 12.05.2024 16:46 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 12 1611 UTC
Maximum Time: 2024 May 12 1626 UTC
End Time: 2024 May 12 1638 UTC
X-ray Class: X1.0
Location: S19W68
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
X-Ray Flux exceeded M5
Emesso: 12.05.2024 16:23 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 12 1620 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

SUMMARY
Proton Event 100MeV Integral Flux exceeded 1pfu
Emesso: 12.05.2024 16:13 UTC
Proton Event 100MeV Integral Flux exceeded 1pfu
Begin Time: 2024 May 11 0210 UTC
Maximum Time: 2024 May 11 0715 UTC
End Time: 2024 May 12 0030 UTC
Maximum 100MeV Flux: 7 pfu

SUMMARY
Proton Event 10MeV Integral Flux exceeded 100pfu
Emesso: 12.05.2024 11:03 UTC
Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2024 May 10 1754 UTC
Maximum Time: 2024 May 11 0910 UTC
End Time: 2024 May 11 1440 UTC
Maximum 10MeV Flux: 207 pfu
NOAA Scale: S2 - Moderate

ALERT
Geomagnetic K-index of 7
Emesso: 12.05.2024 04:37 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 May 12 0433 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 6
Emesso: 12.05.2024 04:21 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 12 0420 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 12.05.2024 03:46 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 12 0340 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 7
Emesso: 12.05.2024 03:01 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 May 12 0259 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 6
Emesso: 12.05.2024 01:34 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 12 0133 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 12.05.2024 01:17 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 12 0110 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 7
Emesso: 11.05.2024 21:44 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 2144 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 6
Emesso: 11.05.2024 21:16 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 11 2116 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 11.05.2024 21:14 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 11 2111 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 7
Emesso: 11.05.2024 19:42 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 1937 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 6
Emesso: 11.05.2024 18:31 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 11 1828 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 11.05.2024 18:25 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 11 1821 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Type IV Radio Emission
Emesso: 11.05.2024 18:03 UTC
Type IV Radio Emission
Begin Time: 2024 May 11 1706 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

WATCH
Geomagnetic Storm Category G4 or Greater Predicted
Emesso: 11.05.2024 17:53 UTC
Geomagnetic Storm Category G4 or Greater Predicted

Highest Storm Level Predicted by Day:
May 12: G5 (Extreme) May 13: G3 (Strong) May 14: G1 (Minor)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

EXTENDED WARNING
Geomagnetic K-index of 7 or greater expected
Emesso: 11.05.2024 17:53 UTC
Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 105
Valid From: 2024 May 10 1715 UTC
Now Valid Until: 2024 May 12 2359 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Emesso: 11.05.2024 17:53 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1876
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 13 1500 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

EXTENDED WARNING
Geomagnetic K-Index of 6 expected
Emesso: 11.05.2024 17:53 UTC
Geomagnetic K-Index of 6 expected
Extension to Serial Number: 521
Valid From: 2024 May 10 1714 UTC
Now Valid Until: 2024 May 13 1200 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

SUMMARY
X-ray Event exceeded M5
Emesso: 11.05.2024 16:58 UTC
X-ray Event exceeded M5
Begin Time: 2024 May 11 1446 UTC
Maximum Time: 2024 May 11 1525 UTC
End Time: 2024 May 11 1552 UTC
X-ray Class: M8.8
Optical Class: 2b
Location: S19W56
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
Geomagnetic K-index of 8, 9-
Emesso: 11.05.2024 16:50 UTC
Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 11 1647 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

ALERT
Geomagnetic K-index of 7
Emesso: 11.05.2024 15:48 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 1545 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 6
Emesso: 11.05.2024 15:22 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 11 1520 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 11.05.2024 15:15 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 11 1511 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 8, 9-
Emesso: 11.05.2024 12:40 UTC
Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 11 1237 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

ALERT
Geomagnetic K-index of 7
Emesso: 11.05.2024 12:36 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 1228 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

SUMMARY
X-ray Event exceeded X1
Emesso: 11.05.2024 12:30 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 11 1115 UTC
Maximum Time: 2024 May 11 1144 UTC
End Time: 2024 May 11 1205 UTC
X-ray Class: X1.5
Optical Class: 2b
Location: S22W44
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
Geomagnetic K-index of 6
Emesso: 11.05.2024 12:21 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 11 1212 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 11.05.2024 12:15 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 11 1206 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 9o
Emesso: 11.05.2024 11:39 UTC
Geomagnetic K-index of 9o
Threshold Reached: 2024 May 11 1128 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G5 - Extreme

Potential Impacts: Area of impact primarily poleward of 40 degrees Geomagnetic Latitude.
Induced Currents - Widespread voltage control problems and protective system problems may occur; some power grid systems may experience component failures or protective device trips resulting in blackouts or disruption of service. Pipeline currents can reach hundreds of amps.
Spacecraft - Systems may experience anomalies to include: extensive surface charging, unexpected orientation and attitude changes, uplink/downlink errors, and satellite orbit degradation.
Navigation - Satellite navigation (GPS) may be degraded or unavailable for days.
Radio - HF (high frequency) radio propagation may be impossible in many areas for one to two days.
Aurora - Aurora may be seen as low as Florida to southern Texas and southern California.

ALERT
X-Ray Flux exceeded M5
Emesso: 11.05.2024 11:38 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 11 1131 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

EXTENDED WARNING
Proton 100MeV Integral Flux above 1pfu expected
Emesso: 11.05.2024 11:20 UTC
Proton 100MeV Integral Flux above 1pfu expected
Extension to Serial Number: 101
Valid From: 2024 May 11 0205 UTC
Now Valid Until: 2024 May 12 1200 UTC
Warning Condition: Persistence

Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact.

EXTENDED WARNING
Proton 10MeV Integral Flux above 10pfu expected
Emesso: 11.05.2024 11:20 UTC
Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 556
Valid From: 2024 May 10 1305 UTC
Now Valid Until: 2024 May 12 2359 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

EXTENDED WARNING
Geomagnetic K-Index of 6 expected
Emesso: 11.05.2024 11:20 UTC
Geomagnetic K-Index of 6 expected
Extension to Serial Number: 520
Valid From: 2024 May 10 1714 UTC
Now Valid Until: 2024 May 12 0900 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

EXTENDED WARNING
Geomagnetic K-index of 7 or greater expected
Emesso: 11.05.2024 11:20 UTC
Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 104
Valid From: 2024 May 10 1715 UTC
Now Valid Until: 2024 May 11 2359 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Emesso: 11.05.2024 11:20 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1875
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 12 1500 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Emesso: 11.05.2024 11:20 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4606
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 13 2359 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WATCH
Geomagnetic Storm Category G3 Predicted
Emesso: 11.05.2024 11:20 UTC
Geomagnetic Storm Category G3 Predicted

Highest Storm Level Predicted by Day:
May 11: G4 (Severe) May 12: G3 (Strong) May 13: G3 (Strong)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

EXTENDED WARNING
Proton 100MeV Integral Flux above 1pfu expected
Emesso: 11.05.2024 11:13 UTC
Proton 100MeV Integral Flux above 1pfu expected
Extension to Serial Number: 100
Valid From: 2024 May 11 0205 UTC
Now Valid Until: 2024 May 12 1200 UTC
Warning Condition: Persistence

Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact.

ALERT
Geomagnetic K-index of 8, 9-
Emesso: 11.05.2024 09:44 UTC
Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 11 0940 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

ALERT
Geomagnetic K-index of 7
Emesso: 11.05.2024 09:41 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 0937 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 6
Emesso: 11.05.2024 09:28 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 11 0926 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 11.05.2024 09:16 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 11 0908 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 8, 9-
Emesso: 11.05.2024 07:09 UTC
Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 11 0703 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

ALERT
Geomagnetic K-index of 7
Emesso: 11.05.2024 06:49 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 0644 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 6
Emesso: 11.05.2024 06:33 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 11 0626 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 11.05.2024 06:19 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 11 0615 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Type IV Radio Emission
Emesso: 11.05.2024 05:19 UTC
Type IV Radio Emission
Begin Time: 2024 May 11 0420 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

ALERT
Geomagnetic K-index of 8, 9-
Emesso: 11.05.2024 03:38 UTC
Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 11 0327 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

ALERT
Geomagnetic K-index of 7
Emesso: 11.05.2024 03:22 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 0314 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 6
Emesso: 11.05.2024 03:16 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 11 0308 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 11.05.2024 03:12 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 10 0303 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 9o
Emesso: 11.05.2024 02:46 UTC
Geomagnetic K-index of 9o
Threshold Reached: 2024 May 11 0240 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G5 - Extreme

Potential Impacts: Area of impact primarily poleward of 40 degrees Geomagnetic Latitude.
Induced Currents - Widespread voltage control problems and protective system problems may occur; some power grid systems may experience component failures or protective device trips resulting in blackouts or disruption of service. Pipeline currents can reach hundreds of amps.
Spacecraft - Systems may experience anomalies to include: extensive surface charging, unexpected orientation and attitude changes, uplink/downlink errors, and satellite orbit degradation.
Navigation - Satellite navigation (GPS) may be degraded or unavailable for days.
Radio - HF (high frequency) radio propagation may be impossible in many areas for one to two days.
Aurora - Aurora may be seen as low as Florida to southern Texas and southern California.

ALERT
Proton Event 100MeV Integral Flux exceeded 1pfu
Emesso: 11.05.2024 02:27 UTC
Proton Event 100MeV Integral Flux exceeded 1pfu
Begin Time: 2024 May 11 0210 UTC

Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact.

WARNING
Proton 100MeV Integral Flux above 1pfu expected
Emesso: 11.05.2024 02:06 UTC
Proton 100MeV Integral Flux above 1pfu expected
Valid From: 2024 May 11 0205 UTC
Valid To: 2024 May 11 1200 UTC
Warning Condition: Onset

Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact.

SUMMARY
10cm Radio Burst
Emesso: 11.05.2024 02:02 UTC
10cm Radio Burst
Begin Time: 2024 May 11 0114 UTC
Maximum Time: 2024 May 11 0124 UTC
End Time: 2024 May 11 0137 UTC
Duration: 23 minutes
Peak Flux: 800 sfu
Latest Penticton Noon Flux: 223 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

ALERT
Type II Radio Emission
Emesso: 11.05.2024 01:52 UTC
Type II Radio Emission
Begin Time: 2024 May 11 0113 UTC
Estimated Velocity: 564 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

SUMMARY
X-ray Event exceeded X1
Emesso: 11.05.2024 01:44 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 11 0110 UTC
Maximum Time: 2024 May 11 0123 UTC
End Time: 2024 May 11 0139 UTC
X-ray Class: X5.8
Optical Class: 2b
Location: S19W45
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
Type IV Radio Emission
Emesso: 11.05.2024 01:34 UTC
Type IV Radio Emission
Begin Time: 2024 May 11 0124 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

ALERT
X-Ray Flux exceeded M5
Emesso: 11.05.2024 01:20 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 11 0115 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

ALERT
Geomagnetic K-index of 8, 9-
Emesso: 11.05.2024 01:02 UTC
Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 11 0053 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

ALERT
Geomagnetic K-index of 7
Emesso: 11.05.2024 00:36 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 0036 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 6
Emesso: 11.05.2024 00:31 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 10 0020 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 11.05.2024 00:21 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 11 0020 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

EXTENDED WARNING
Geomagnetic K-Index of 6 expected
Emesso: 10.05.2024 23:57 UTC
Geomagnetic K-Index of 6 expected
Extension to Serial Number: 519
Valid From: 2024 May 10 1714 UTC
Now Valid Until: 2024 May 11 1800 UTC
Warning Condition: Onset

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Emesso: 10.05.2024 23:57 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1874
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 11 2100 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Emesso: 10.05.2024 23:57 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4605
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 12 0000 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

EXTENDED WARNING
Geomagnetic K-index of 7 or greater expected
Emesso: 10.05.2024 23:48 UTC
Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 103
Valid From: 2024 May 10 1715 UTC
Now Valid Until: 2024 May 11 1200 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 9o
Emesso: 10.05.2024 23:34 UTC
Geomagnetic K-index of 9o
Threshold Reached: 2024 May 10 2254 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G5 - Extreme

Potential Impacts: Area of impact primarily poleward of 40 degrees Geomagnetic Latitude.
Induced Currents - Widespread voltage control problems and protective system problems may occur; some power grid systems may experience component failures or protective device trips resulting in blackouts or disruption of service. Pipeline currents can reach hundreds of amps.
Spacecraft - Systems may experience anomalies to include: extensive surface charging, unexpected orientation and attitude changes, uplink/downlink errors, and satellite orbit degradation.
Navigation - Satellite navigation (GPS) may be degraded or unavailable for days.
Radio - HF (high frequency) radio propagation may be impossible in many areas for one to two days.
Aurora - Aurora may be seen as low as Florida to southern Texas and southern California.

EXTENDED WARNING
Proton 10MeV Integral Flux above 10pfu expected
Emesso: 10.05.2024 23:30 UTC
Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 555
Valid From: 2024 May 10 1305 UTC
Now Valid Until: 2024 May 11 1200 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

ALERT
Geomagnetic K-index of 8, 9-
Emesso: 10.05.2024 21:45 UTC
Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 10 2139 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

ALERT
Geomagnetic K-index of 7
Emesso: 10.05.2024 21:26 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 May 10 2122 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 6
Emesso: 10.05.2024 21:15 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 10 2110 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 10.05.2024 21:15 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 10 2110 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 8, 9-
Emesso: 10.05.2024 19:04 UTC
Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 10 1901 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

ALERT
Geomagnetic K-index of 7
Emesso: 10.05.2024 18:31 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 May 10 1829 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 6
Emesso: 10.05.2024 18:22 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 10 1819 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 10.05.2024 18:14 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 10 1809 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Proton Event 10MeV Integral Flux exceeded 100pfu
Emesso: 10.05.2024 17:54 UTC
Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2024 May 10 1745 UTC
NOAA Scale: S2 - Moderate

Potential Impacts: Radiation - Passengers and crew in high latitude, high altitude flights may experience small, increased radiation exposures.
Spacecraft - Infrequent single-event upsets to satellites are possible.
Radio - Small effects on polar HF (high frequency) propagation resulting in fades at lower frequencies.

ALERT
Geomagnetic K-index of 8, 9-
Emesso: 10.05.2024 17:44 UTC
Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 10 1739 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

SUMMARY
Geomagnetic Sudden Impulse
Emesso: 10.05.2024 17:29 UTC
Geomagnetic Sudden Impulse
Observed: 2024 May 10 1645 UTC
Deviation: 108 nT
Station: Boulder

ALERT
Geomagnetic K-index of 7
Emesso: 10.05.2024 17:18 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 May 10 1708 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 6
Emesso: 10.05.2024 17:17 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 10 1708 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

WARNING
Geomagnetic K-index of 7 or greater expected
Emesso: 10.05.2024 17:16 UTC
Geomagnetic K-index of 7 or greater expected
Valid From: 2024 May 10 1715 UTC
Valid To: 2024 May 10 2359 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

WARNING
Geomagnetic K-Index of 6 expected
Emesso: 10.05.2024 17:15 UTC
Geomagnetic K-Index of 6 expected
Valid From: 2024 May 10 1714 UTC
Valid To: 2024 May 11 0900 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 10.05.2024 17:14 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 10 1707 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 4
Emesso: 10.05.2024 17:11 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 May 10 1707 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WARNING
Geomagnetic K-index of 5 expected
Emesso: 10.05.2024 16:51 UTC
Geomagnetic K-index of 5 expected
Valid From: 2024 May 10 1700 UTC
Valid To: 2024 May 11 1200 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

WARNING
Geomagnetic K-index of 4 expected
Emesso: 10.05.2024 16:50 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 May 10 1700 UTC
Valid To: 2024 May 11 1500 UTC
Warning Condition: Onset

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WARNING
Geomagnetic Sudden Impulse expected
Emesso: 10.05.2024 16:47 UTC
Geomagnetic Sudden Impulse expected
Valid From: 2024 May 10 1700 UTC
Valid To: 2024 May 10 1730 UTC
IP Shock Passage Observed: 2024 May 10 1639 UTC

ALERT
X-Ray Flux exceeded M5
Emesso: 10.05.2024 14:11 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 10 1407 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

ALERT
Proton Event 10MeV Integral Flux exceeded 10pfu
Emesso: 10.05.2024 13:51 UTC
Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2024 May 10 1335 UTC
NOAA Scale: S1 - Minor

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

WARNING
Proton 10MeV Integral Flux above 10pfu expected
Emesso: 10.05.2024 13:03 UTC
Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2024 May 10 1305 UTC
Valid To: 2024 May 10 2359 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

SUMMARY
X-ray Event exceeded X1
Emesso: 10.05.2024 07:40 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 10 0627 UTC
Maximum Time: 2024 May 10 0654 UTC
End Time: 2024 May 10 0706 UTC
X-ray Class: X3.9
Optical Class: 3b
Location: S15W36
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
Type IV Radio Emission
Emesso: 10.05.2024 07:31 UTC
Type IV Radio Emission
Begin Time: 2024 May 10 0651 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

ALERT
Type II Radio Emission
Emesso: 10.05.2024 07:30 UTC
Type II Radio Emission
Begin Time: 2024 May 10 0646 UTC
Estimated Velocity: 1248 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

SUMMARY
10cm Radio Burst
Emesso: 10.05.2024 07:16 UTC
10cm Radio Burst
Begin Time: 2024 May 10 0638 UTC
Maximum Time: 2024 May 10 0643 UTC
End Time: 2024 May 10 0654 UTC
Duration: 16 minutes
Peak Flux: 900 sfu
Latest Penticton Noon Flux: 233 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

ALERT
X-Ray Flux exceeded M5
Emesso: 10.05.2024 06:44 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 10 0641 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

SUMMARY
10cm Radio Burst
Emesso: 09.05.2024 18:10 UTC
10cm Radio Burst
Begin Time: 2024 May 09 1731 UTC
Maximum Time: 2024 May 09 1745 UTC
End Time: 2024 May 09 1752 UTC
Duration: 21 minutes
Peak Flux: 300 sfu
Latest Penticton Noon Flux: 227 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

SUMMARY
X-ray Event exceeded X1
Emesso: 09.05.2024 18:09 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 09 1723 UTC
Maximum Time: 2024 May 09 1744 UTC
End Time: 2024 May 09 1800 UTC
X-ray Class: X1.1
Location: S19W30
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
Type IV Radio Emission
Emesso: 09.05.2024 18:01 UTC
Type IV Radio Emission
Begin Time: 2024 May 09 1745 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

ALERT
Type II Radio Emission
Emesso: 09.05.2024 17:44 UTC
Type II Radio Emission
Begin Time: 2024 May 09 1732 UTC
Estimated Velocity: 303 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

ALERT
X-Ray Flux exceeded M5
Emesso: 09.05.2024 17:35 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 09 1733 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

WATCH
Geomagnetic Storm Category G4 or Greater Predicted
Emesso: 09.05.2024 17:22 UTC
Geomagnetic Storm Category G4 or Greater Predicted

Highest Storm Level Predicted by Day:
May 10: G1 (Minor) May 11: G4 (Severe) May 12: G2 (Moderate)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

SUMMARY
10cm Radio Burst
Emesso: 09.05.2024 12:51 UTC
10cm Radio Burst
Begin Time: 2024 May 09 0852 UTC
Maximum Time: 2024 May 09 0939 UTC
End Time: 2024 May 09 0942 UTC
Duration: 50 minutes
Peak Flux: 3600 sfu
Latest Penticton Noon Flux: 227 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

SUMMARY
X-ray Event exceeded X1
Emesso: 09.05.2024 09:52 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 09 0845 UTC
Maximum Time: 2024 May 09 0913 UTC
End Time: 2024 May 09 0936 UTC
X-ray Class: X2.2
Optical Class: 3b
Location: S20W26
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
Type IV Radio Emission
Emesso: 09.05.2024 09:36 UTC
Type IV Radio Emission
Begin Time: 2024 May 09 0910 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

ALERT
Type II Radio Emission
Emesso: 09.05.2024 09:34 UTC
Type II Radio Emission
Begin Time: 2024 May 09 0902 UTC
Estimated Velocity: 1004 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

ALERT
X-Ray Flux exceeded M5
Emesso: 09.05.2024 08:55 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 09 0853 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

WATCH
Geomagnetic Storm Category G3 Predicted
Emesso: 09.05.2024 08:34 UTC
Geomagnetic Storm Category G3 Predicted

Highest Storm Level Predicted by Day:
May 09: None (Below G1) May 10: G1 (Minor) May 11: G3 (Strong)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

SUMMARY
10cm Radio Burst
Emesso: 09.05.2024 00:20 UTC
10cm Radio Burst
Begin Time: 2024 May 08 2134 UTC
Maximum Time: 2024 May 08 2209 UTC
End Time: 2024 May 08 2309 UTC
Duration: 175 minutes
Peak Flux: 1000 sfu
Latest Penticton Noon Flux: 227 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

SUMMARY
X-ray Event exceeded X1
Emesso: 08.05.2024 23:37 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 08 2108 UTC
Maximum Time: 2024 May 08 2140 UTC
End Time: 2024 May 08 2310 UTC
X-ray Class: X1.0
Location: S21W18
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
X-Ray Flux exceeded M5
Emesso: 08.05.2024 21:29 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 08 2128 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

SUMMARY
X-ray Event exceeded M5
Emesso: 08.05.2024 18:14 UTC
X-ray Event exceeded M5
Begin Time: 2024 May 08 1732 UTC
Maximum Time: 2024 May 08 1753 UTC
End Time: 2024 May 08 1800 UTC
X-ray Class: M7.9
Optical Class: sf
Location: S18W13
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
X-Ray Flux exceeded M5
Emesso: 08.05.2024 17:50 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 08 1743 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

WATCH
Geomagnetic Storm Category G2 Predicted
Emesso: 08.05.2024 16:03 UTC
Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
May 09: None (Below G1) May 10: G1 (Minor) May 11: G2 (Moderate)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

SUMMARY
X-ray Event exceeded M5
Emesso: 08.05.2024 12:36 UTC
X-ray Event exceeded M5
Begin Time: 2024 May 08 1126 UTC
Maximum Time: 2024 May 08 1204 UTC
End Time: 2024 May 08 1217 UTC
X-ray Class: M8.6
Location: S35W01
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
X-Ray Flux exceeded M5
Emesso: 08.05.2024 11:49 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 08 1147 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

SUMMARY
X-ray Event exceeded M5
Emesso: 08.05.2024 07:09 UTC
X-ray Event exceeded M5
Begin Time: 2024 May 08 0644 UTC
Maximum Time: 2024 May 08 0653 UTC
End Time: 2024 May 08 0703 UTC
X-ray Class: M7.1
Optical Class: sf
Location: S20W12
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
X-Ray Flux exceeded M5
Emesso: 08.05.2024 06:52 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 08 0650 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

SUMMARY
10cm Radio Burst
Emesso: 08.05.2024 06:48 UTC
10cm Radio Burst
Begin Time: 2024 May 08 0454 UTC
Maximum Time: 2024 May 08 0459 UTC
End Time: 2024 May 08 0516 UTC
Duration: 22 minutes
Peak Flux: 570 sfu
Latest Penticton Noon Flux: 204 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

SUMMARY
X-ray Event exceeded X1
Emesso: 08.05.2024 05:39 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 08 0437 UTC
Maximum Time: 2024 May 08 0509 UTC
End Time: 2024 May 08 0532 UTC
X-ray Class: X1.0
Optical Class: 2b
Location: S21W11
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
Type IV Radio Emission
Emesso: 08.05.2024 05:29 UTC
Type IV Radio Emission
Begin Time: 2024 May 08 0508 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

ALERT
Type II Radio Emission
Emesso: 08.05.2024 05:24 UTC
Type II Radio Emission
Begin Time: 2024 May 08 0501 UTC
Estimated Velocity: 1152 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

ALERT
X-Ray Flux exceeded M5
Emesso: 08.05.2024 04:51 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 08 0449 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

SUMMARY
X-ray Event exceeded X1
Emesso: 08.05.2024 01:54 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 08 0133 UTC
Maximum Time: 2024 May 08 0141 UTC
End Time: 2024 May 08 0148 UTC
X-ray Class: X1
Optical Class: 1b
Location: N24W58
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
X-Ray Flux exceeded M5
Emesso: 08.05.2024 01:41 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 08 0140 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

SUMMARY
X-ray Event exceeded M5
Emesso: 07.05.2024 16:42 UTC
X-ray Event exceeded M5
Begin Time: 2024 May 07 1621 UTC
Maximum Time: 2024 May 07 1630 UTC
End Time: 2024 May 07 1636 UTC
X-ray Class: M8.2
Location: N22W51
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
X-Ray Flux exceeded M5
Emesso: 07.05.2024 16:33 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 07 1630 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

SUMMARY
X-ray Event exceeded M5
Emesso: 07.05.2024 06:55 UTC
X-ray Event exceeded M5
Begin Time: 2024 May 07 0558 UTC
Maximum Time: 2024 May 07 0615 UTC
End Time: 2024 May 07 0627 UTC
X-ray Class: M5.1
Optical Class: na
Location: N27W44
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
X-Ray Flux exceeded M5
Emesso: 07.05.2024 06:18 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 07 0615 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Emesso: 06.05.2024 09:00 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4603
Valid From: 2024 May 05 1930 UTC
Now Valid Until: 2024 May 06 2100 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Emesso: 06.05.2024 08:55 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1872
Valid From: 2024 May 05 2335 UTC
Now Valid Until: 2024 May 06 1800 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

SUMMARY
X-ray Event exceeded X1
Emesso: 06.05.2024 07:01 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 06 0538 UTC
Maximum Time: 2024 May 06 0635 UTC
End Time: 2024 May 06 0647 UTC
X-ray Class: X4.5
Optical Class: 3b
Location: N23W34
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
X-Ray Flux exceeded M5
Emesso: 06.05.2024 06:10 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 06 0608 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

ALERT
Geomagnetic K-index of 5
Emesso: 06.05.2024 01:18 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 06 0117 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

WARNING
Geomagnetic K-Index of 6 expected
Emesso: 06.05.2024 01:18 UTC
Geomagnetic K-Index of 6 expected
Valid From: 2024 May 06 0118 UTC
Valid To: 2024 May 06 0900 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

WARNING
Geomagnetic K-index of 5 expected
Emesso: 05.05.2024 23:36 UTC
Geomagnetic K-index of 5 expected
Valid From: 2024 May 05 2335 UTC
Valid To: 2024 May 06 0900 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 4
Emesso: 05.05.2024 23:33 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 May 05 2333 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WARNING
Geomagnetic K-index of 4 expected
Emesso: 05.05.2024 19:32 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 May 05 1930 UTC
Valid To: 2024 May 06 1200 UTC
Warning Condition: Onset

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

SUMMARY
X-ray Event exceeded X1
Emesso: 05.05.2024 12:32 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 05 1141 UTC
Maximum Time: 2024 May 05 1154 UTC
End Time: 2024 May 05 1243 UTC
X-ray Class: X1.2
Optical Class: sn
Location: N24W24
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
X-Ray Flux exceeded M5
Emesso: 05.05.2024 11:52 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 05 1150 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

SUMMARY
X-ray Event exceeded M5
Emesso: 05.05.2024 10:38 UTC
X-ray Event exceeded M5
Begin Time: 2024 May 05 0953 UTC
Maximum Time: 2024 May 05 1000 UTC
End Time: 2024 May 05 1019 UTC
X-ray Class: M7.4
Location: N26W24
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
X-Ray Flux exceeded M5
Emesso: 05.05.2024 09:59 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 05 0957 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

SUMMARY
X-ray Event exceeded X1
Emesso: 05.05.2024 06:20 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 05 0547 UTC
Maximum Time: 2024 May 05 0601 UTC
End Time: 2024 May 05 0607 UTC
X-ray Class: X1.3
Optical Class: 1b
Location: N23W21
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
X-Ray Flux exceeded M5
Emesso: 05.05.2024 06:01 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 05 0558 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

SUMMARY
10cm Radio Burst
Emesso: 05.05.2024 03:20 UTC
10cm Radio Burst
Begin Time: 2024 May 05 0259 UTC
Maximum Time: 2024 May 05 0300 UTC
End Time: 2024 May 05 0301 UTC
Duration: 3 minutes
Peak Flux: 280 sfu
Latest Penticton Noon Flux: 167 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

SUMMARY
X-ray Event exceeded M5
Emesso: 05.05.2024 01:53 UTC
X-ray Event exceeded M5
Begin Time: 2024 May 05 0115 UTC
Maximum Time: 2024 May 05 0127 UTC
End Time: 2024 May 05 0143 UTC
X-ray Class: M8.4
Optical Class: 1b
Location: N25W19
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
X-Ray Flux exceeded M5
Emesso: 05.05.2024 01:25 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 05 0123 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

SUMMARY
X-ray Event exceeded M5
Emesso: 05.05.2024 00:11 UTC
X-ray Event exceeded M5
Begin Time: 2024 May 04 2328 UTC
Maximum Time: 2024 May 04 2348 UTC
End Time: 2024 May 04 2355 UTC
X-ray Class: M9.0
Optical Class: 1b
Location: N26W10
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
X-Ray Flux exceeded M5
Emesso: 04.05.2024 23:42 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 04 2339 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

ALERT
Type IV Radio Emission
Emesso: 04.05.2024 06:56 UTC
Type IV Radio Emission
Begin Time: 2024 May 04 0638 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

ALERT
Type II Radio Emission
Emesso: 04.05.2024 06:55 UTC
Type II Radio Emission
Begin Time: 2024 May 04 0625 UTC
Estimated Velocity: 950 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

SUMMARY
X-ray Event exceeded M5
Emesso: 04.05.2024 06:42 UTC
X-ray Event exceeded M5
Begin Time: 2024 May 04 0602 UTC
Maximum Time: 2024 May 04 0619 UTC
End Time: 2024 May 04 0630 UTC
X-ray Class: M9.1
Optical Class: 1b
Location: N26W07
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

SUMMARY
10cm Radio Burst
Emesso: 04.05.2024 06:38 UTC
10cm Radio Burst
Begin Time: 2024 May 04 0613 UTC
Maximum Time: 2024 May 04 0614 UTC
End Time: 2024 May 04 0616 UTC
Duration: 3 minutes
Peak Flux: 280 sfu
Latest Penticton Noon Flux: 156 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

ALERT
X-Ray Flux exceeded M5
Emesso: 04.05.2024 06:18 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 04 0616 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

ALERT
Type IV Radio Emission
Emesso: 03.05.2024 23:59 UTC
Type IV Radio Emission
Begin Time: 2024 May 03 2035 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

ALERT
Type II Radio Emission
Emesso: 03.05.2024 21:02 UTC
Type II Radio Emission
Begin Time: 2024 May 03 2023 UTC
Estimated Velocity: 453 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

WATCH
Geomagnetic Storm Category G2 Predicted
Emesso: 03.05.2024 20:59 UTC
Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
May 04: None (Below G1) May 05: G1 (Minor) May 06: G2 (Moderate)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Type IV Radio Emission
Emesso: 03.05.2024 02:51 UTC
Type IV Radio Emission
Begin Time: 2024 May 03 0232 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

SUMMARY
10cm Radio Burst
Emesso: 03.05.2024 02:39 UTC
10cm Radio Burst
Begin Time: 2024 May 03 0219 UTC
Maximum Time: 2024 May 03 0219 UTC
End Time: 2024 May 03 0223 UTC
Duration: 4 minutes
Peak Flux: 660 sfu
Latest Penticton Noon Flux: 142 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

SUMMARY
X-ray Event exceeded X1
Emesso: 03.05.2024 02:38 UTC
X-ray Event exceeded X1
Begin Time: 2024 May 03 0211 UTC
Maximum Time: 2024 May 03 0222 UTC
End Time: 2024 May 03 0227 UTC
X-ray Class: X1.6
Optical Class: 1b
Location: N23E06
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
Type II Radio Emission
Emesso: 03.05.2024 02:36 UTC
Type II Radio Emission
Begin Time: 2024 May 03 0220 UTC
Estimated Velocity: 959 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

ALERT
X-Ray Flux exceeded M5
Emesso: 03.05.2024 02:22 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 May 03 0219 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

ALERT
Geomagnetic K-index of 7
Emesso: 02.05.2024 21:00 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 May 02 2059 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Emesso: 02.05.2024 20:56 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4601
Valid From: 2024 May 02 1335 UTC
Now Valid Until: 2024 May 03 1500 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

EXTENDED WARNING
Geomagnetic K-Index of 6 expected
Emesso: 02.05.2024 20:56 UTC
Geomagnetic K-Index of 6 expected
Extension to Serial Number: 516
Valid From: 2024 May 02 1450 UTC
Now Valid Until: 2024 May 03 0900 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Emesso: 02.05.2024 20:56 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1870
Valid From: 2024 May 02 1355 UTC
Now Valid Until: 2024 May 03 1200 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

EXTENDED WARNING
Geomagnetic K-index of 7 or greater expected
Emesso: 02.05.2024 20:56 UTC
Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 101
Valid From: 2024 May 02 1640 UTC
Now Valid Until: 2024 May 03 0300 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 6
Emesso: 02.05.2024 19:17 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 02 1917 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 02.05.2024 19:04 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 02 1904 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 7
Emesso: 02.05.2024 18:03 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 May 02 1759 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

WARNING
Geomagnetic K-index of 7 or greater expected
Emesso: 02.05.2024 16:39 UTC
Geomagnetic K-index of 7 or greater expected
Valid From: 2024 May 02 1640 UTC
Valid To: 2024 May 02 2100 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

ALERT
Geomagnetic K-index of 6
Emesso: 02.05.2024 16:24 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 May 02 1624 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 5
Emesso: 02.05.2024 16:05 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 02 1605 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 5
Emesso: 02.05.2024 14:50 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 May 02 1448 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

WARNING
Geomagnetic K-Index of 6 expected
Emesso: 02.05.2024 14:50 UTC
Geomagnetic K-Index of 6 expected
Valid From: 2024 May 02 1450 UTC
Valid To: 2024 May 02 2100 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

ALERT
Geomagnetic K-index of 4
Emesso: 02.05.2024 14:22 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 May 02 1422 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

SUMMARY
Geomagnetic Sudden Impulse
Emesso: 02.05.2024 14:22 UTC
Geomagnetic Sudden Impulse
Observed: 2024 May 02 1412 UTC
Deviation: 29 nT
Station: HAD

WARNING
Geomagnetic K-index of 5 expected
Emesso: 02.05.2024 13:51 UTC
Geomagnetic K-index of 5 expected
Valid From: 2024 May 02 1355 UTC
Valid To: 2024 May 02 2100 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

WARNING
Geomagnetic K-index of 4 expected
Emesso: 02.05.2024 13:32 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 May 02 1335 UTC
Valid To: 2024 May 03 0600 UTC
Warning Condition: Onset

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WARNING
Geomagnetic Sudden Impulse expected
Emesso: 02.05.2024 13:29 UTC
Geomagnetic Sudden Impulse expected
Valid From: 2024 May 02 1404 UTC
Valid To: 2024 May 02 1434 UTC
IP Shock Passage Observed: 2024 May 02 1317 UTC

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Emesso: 01.05.2024 02:26 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4599
Valid From: 2024 Apr 30 2242 UTC
Now Valid Until: 2024 May 01 0900 UTC
Warning Condition: Persistence

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

SUMMARY
X-ray Event exceeded M5
Emesso: 01.05.2024 00:04 UTC
X-ray Event exceeded M5
Begin Time: 2024 Apr 30 2323 UTC
Maximum Time: 2024 Apr 30 2346 UTC
End Time: 2024 Apr 30 2358 UTC
X-ray Class: M9.5
Optical Class: 2b
Location: S07W63
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

SUMMARY
10cm Radio Burst
Emesso: 30.04.2024 23:55 UTC
10cm Radio Burst
Begin Time: 2024 Apr 30 2342 UTC
Maximum Time: 2024 Apr 30 2343 UTC
End Time: 2024 Apr 30 2345 UTC
Duration: 3 minutes
Peak Flux: 270 sfu
Latest Penticton Noon Flux: 130 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

ALERT
X-Ray Flux exceeded M5
Emesso: 30.04.2024 23:49 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 Apr 30 2343 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

WARNING
Geomagnetic K-index of 5 expected
Emesso: 30.04.2024 23:33 UTC
Geomagnetic K-index of 5 expected
Valid From: 2024 Apr 30 2332 UTC
Valid To: 2024 May 01 0300 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 4
Emesso: 30.04.2024 23:16 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 Apr 30 2315 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes

Comment: Conditions were likely first reached at approximately 30/1955 UTC. However, a major network outage prevented alert issuance.

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WARNING
Geomagnetic K-index of 4 expected
Emesso: 30.04.2024 22:43 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 Apr 30 2242 UTC
Valid To: 2024 May 01 0300 UTC
Warning Condition: Persistence

Comment: Conditions were likely first reached at approximately 30/1642 UTC. However, a major network outage prevented warning issuance.

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WARNING
Geomagnetic K-index of 4 expected
Emesso: 30.04.2024 16:42 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 Apr 30 1642 UTC
Valid To: 2024 Apr 30 2359 UTC
Warning Condition: Onset

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

ALERT
Geomagnetic K-index of 4
Emesso: 28.04.2024 02:32 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 Apr 28 0230 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WARNING
Geomagnetic K-index of 4 expected
Emesso: 27.04.2024 14:16 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 Apr 27 1415 UTC
Valid To: 2024 Apr 28 0600 UTC
Warning Condition: Onset

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Emesso: 26.04.2024 23:00 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4595
Valid From: 2024 Apr 26 0500 UTC
Now Valid Until: 2024 Apr 27 1200 UTC
Warning Condition: Onset

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

ALERT
Geomagnetic K-index of 5
Emesso: 26.04.2024 16:51 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Apr 26 1649 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

WARNING
Geomagnetic K-index of 5 expected
Emesso: 26.04.2024 16:48 UTC
Geomagnetic K-index of 5 expected
Valid From: 2024 Apr 26 1646 UTC
Valid To: 2024 Apr 26 2359 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

ALERT
Geomagnetic K-index of 4
Emesso: 26.04.2024 14:59 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 Apr 26 1456 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Emesso: 26.04.2024 14:06 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4594
Valid From: 2024 Apr 26 0500 UTC
Now Valid Until: 2024 Apr 26 2359 UTC
Warning Condition: Onset

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WARNING
Geomagnetic K-index of 4 expected
Emesso: 26.04.2024 04:51 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 Apr 26 0500 UTC
Valid To: 2024 Apr 26 1500 UTC
Warning Condition: Onset

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Emesso: 25.04.2024 10:59 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2024 Apr 25 1045 UTC
Station: GOES16

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

ALERT
Type IV Radio Emission
Emesso: 24.04.2024 15:00 UTC
Type IV Radio Emission
Begin Time: 2024 Apr 24 1440 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

ALERT
Type II Radio Emission
Emesso: 24.04.2024 14:32 UTC
Type II Radio Emission
Begin Time: 2024 Apr 24 1415 UTC
Estimated Velocity: 800 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

ALERT
Type II Radio Emission
Emesso: 23.04.2024 19:16 UTC
Type II Radio Emission
Begin Time: 2024 Apr 23 1710 UTC
Estimated Velocity: 358 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

SUMMARY
10cm Radio Burst
Emesso: 23.04.2024 03:57 UTC
10cm Radio Burst
Begin Time: 2024 Apr 23 0313 UTC
Maximum Time: 2024 Apr 23 0314 UTC
End Time: 2024 Apr 23 0315 UTC
Duration: 2 minutes
Peak Flux: 290 sfu
Latest Penticton Noon Flux: 227 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

ALERT
Type II Radio Emission
Emesso: 22.04.2024 22:07 UTC
Type II Radio Emission
Begin Time: 2024 Apr 22 2119 UTC
Estimated Velocity: 395 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

Table

Data Radio flux 10.7 cm SESC Numero di macchie solari Zona macchie solari 10E-6 Nuove regioni GOES15 X-ray Bkgd flux Brillamenti
X-ray Ottica
C M X S 1 2 3
22.04.2024 227 283 1280 1 * 8 7 0 19 3 0 0
23.04.2024 219 282 1470 0 * 9 3 0 21 4 0 0
24.04.2024 199 283 1500 1 * 11 5 0 12 1 1 0
25.04.2024 167 196 1070 1 * 9 3 0 4 0 0 0
26.04.2024 153 154 600 0 * 6 0 0 6 0 0 0
27.04.2024 153 126 500 1 * 2 2 0 10 0 0 0
28.04.2024 140 119 510 0 * 7 0 0 13 0 0 0
29.04.2024 138 88 650 2 * 7 2 0 4 2 0 0
30.04.2024 130 85 670 1 * 3 4 0 9 0 1 0
01.05.2024 135 104 640 1 * 6 2 0 8 1 0 0
02.05.2024 142 125 760 1 * 12 2 0 29 1 0 0
03.05.2024 156 121 1000 1 * 10 5 1 30 4 0 0
04.05.2024 167 136 1210 1 * 14 6 0 21 4 0 0
05.05.2024 177 152 1540 2 * 10 9 2 22 8 2 0
06.05.2024 171 148 1470 1 * 15 5 1 10 4 3 2
07.05.2024 204 144 1350 0 * 2 11 0 21 2 1 0
08.05.2024 227 142 1890 0 * 3 11 4 11 5 2 2
09.05.2024 233 170 1680 2 * 0 12 2 15 6 1 1
10.05.2024 223 156 3110 0 * 3 10 1 10 2 3 0
11.05.2024 214 148 2530 3 * 4 5 2 11 1 4 0
12.05.2024 222 186 2460 4 * 5 9 1 24 1 0 0
13.05.2024 215 207 1800 2 * 7 7 0 13 0 0 0
14.05.2024 220 185 860 1 * 2 1 3 3 0 1 0
15.05.2024 216 173 810 1 * 5 2 1 6 0 0 0
16.05.2024 207 208 860 2 * 7 1 0 4 0 0 0
17.05.2024 204 168 1020 1 * 8 1 0 17 1 1 0
18.05.2024 194 166 1180 0 * 4 0 0 6 2 0 0
19.05.2024 201 154 990 1 * 4 3 0 2 3 0 0
20.05.2024 200 124 840 0 * 5 0 0 4 0 0 0
21.05.2024 191 146 1020 2 * 7 1 0 9 1 1 0
01.01.1970
Media/Totale 182 157 1202 33 195 129 18 374 56 21 5

Grafico riassuntivo

Brillamenti

Solar wind

Solar Wind

The solar wind is a stream of plasma released from the upper atmosphere of the Sun. It consists of mostly electrons, protons and alpha particles with energies usually between 1.5 and 10 keV. The stream of particles varies in density, temperature, and speed over time and over solar longitude. These particles can escape the Sun's gravity because of their high energy, from the high temperature of the corona and magnetic, electrical and electromagnetic phenomena in it.

The solar wind is divided into two components, respectively termed the slow solar wind and the fast solar wind. The slow solar wind has a velocity of about 400 km/s, a temperature of 1.4–1.6×10e6 K and a composition that is a close match to the corona. By contrast, the fast solar wind has a typical velocity of 750 km/s, a temperature of 8×10e5 K and it nearly matches the composition of the Sun's photosphere. The slow solar wind is twice as dense and more variable in intensity than the fast solar wind. The slow wind also has a more complex structure, with turbulent regions and large-scale structures.

Solar radio flux at 10.7 cm

Solar radio flux at 10.7 cm

The solar radio flux at 10.7 cm (2800 MHz) is an excellent indicator of solar activity. Often called the F10.7 index, it is one of the longest running records of solar activity. The F10.7 radio emissions originates high in the chromosphere and low in the corona of the solar atmosphere. The F10.7 correlates well with the sunspot number as well as a number of UltraViolet (UV) and visible solar irradiance records. Reported in “solar flux units”, (s.f.u.), the F10.7 can vary from below 50 s.f.u., to above 300 s.f.u., over the course of a solar cycle.

Flares

Flares

A solar flare is a sudden flash of brightness observed over the Sun's surface or the solar limb, which is interpreted as a large energy release of up to 6 × 10e25 joules of energy. They are often, but not always, followed by a colossal coronal mass ejection. The flare ejects clouds of electrons, ions, and atoms through the corona of the sun into space. These clouds typically reach Earth a day or two after the event.

Solar flares affect all layers of the solar atmosphere (photosphere, chromosphere, and corona), when the plasma medium is heated to tens of millions of kelvin, while the electrons, protons, and heavier ions are accelerated to near the speed of light. They produce radiation across the electromagnetic spectrum at all wavelengths, from radio waves to gamma rays, although most of the energy is spread over frequencies outside the visual range and for this reason the majority of the flares are not visible to the naked eye and must be observed with special instruments. Flares occur in active regions around sunspots, where intense magnetic fields penetrate the photosphere to link the corona to the solar interior. Flares are powered by the sudden (timescales of minutes to tens of minutes) release of magnetic energy stored in the corona. The same energy releases may produce coronal mass ejections (CME), although the relation between CMEs and flares is still not well established.

The frequency of occurrence of solar flares varies, from several per day when the Sun is particularly "active" to less than one every week when the Sun is "quiet", following the 11-year cycle (the solar cycle). Large flares are less frequent than smaller ones.

Classification

Solar flares are classified as A, B, C, M or X according to the peak flux (in watts per square metre, W/m2) of 100 to 800 picometre X-rays near Earth, as measured on the GOES spacecraft.

Classification Peak Flux Range at 100-800 picometer
W/m2
A < 10e-7
B 10e-7 to 10e-6
C 10e-6 to 10e-5
M 10e-5 to 10e-4
X 10e-4 to 10e-3
Z > 10e-3

An earlier flare classification is based on Hα spectral observations. The scheme uses both the intensity and emitting surface. The classification in intensity is qualitative, referring to the flares as: (f)aint, (n)ormal or (b)rilliant. The emitting surface is measured in terms of millionths of the hemisphere and is described below. (The total hemisphere area AH = 6.2 × 1012 km2.)

Classification Corrected area
(millionths of hemisphere)
S < 100
1 100 - 250
2 250 - 600
3 600 - 1200
4 > 1200

Sunspot number

Sunspots

Sunspots are temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to surrounding regions. They correspond to concentrations of magnetic field that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere. Sunspots usually appear in pairs, with pair members of opposite magnetic polarity. The number of sunspots varies according to the approximately 11-year solar cycle.

Sunspot populations quickly rise and more slowly fall on an irregular cycle of 11 years, although significant variations in the number of sunspots attending the 11-year period are known over longer spans of time. For example, from 1900 to the 1960s, the solar maxima trend of sunspot count has been upward; from the 1960s to the present, it has diminished somewhat. Over the last decades the Sun has had a markedly high average level of sunspot activity; it was last similarly active over 8,000 years ago.

The number of sunspots correlates with the intensity of solar radiation over the period since 1979, when satellite measurements of absolute radiative flux became available. Since sunspots are darker than the surrounding photosphere it might be expected that more sunspots would lead to less solar radiation and a decreased solar constant. However, the surrounding margins of sunspots are brighter than the average, and so are hotter; overall, more sunspots increase the Sun's solar constant or brightness. The variation caused by the sunspot cycle to solar output is relatively small, on the order of 0.1% of the solar constant (a peak-to-trough range of 1.3 W/m2 compared to 1366 W/m2 for the average solar constant).

Indici K



Oggi


0h
UTC
3h
UTC
6h
UTC
9h
UTC
12h
UTC
15h
UTC
18h
UTC
21h
UTC
2. 00 0. 67 0.



Data


Estimated Planetary

Estimated Planetary

Data A Indici K (UTC)
0h 3h 6h 9h 12h 15h 18h 21h
23.04.2024 8 2. 00 1. 00 2.
24.04.2024 4 2. 00 0. 33 0.
25.04.2024 3 0. 67 0. 33 0.
26.04.2024 19 2. 00 2. 33 3.
27.04.2024 12 3. 00 3. 00 2.
28.04.2024 7 3. 67 2. 00 1.
29.04.2024 6 2. 00 1. 33 2.
30.04.2024 12 2. 00 1. 67 0.
01.05.2024 8 3. 67 2. 33 1.
02.05.2024 44 2. 67 2. 00 2.
03.05.2024 10 4. 33 3. 33 1.
04.05.2024 6 1. 33 1. 33 0.
05.05.2024 12 2. 00 1. 33 2.
06.05.2024 15 5. 00 2. 33 2.
07.05.2024 7 2. 00 2. 00 1.
08.05.2024 7 1. 33 2. 33 1.
09.05.2024 7 1. 00 2. 00 1.
10.05.2024 18 3. 00 3. 00 2.
11.05.2024 73 9. 00 8. 33 8.
12.05.2024 54 6. 67 7. 00 3.
13.05.2024 30 5. 67 6. 00 4.
14.05.2024 6 2. 00 1. 67 1.
15.05.2024 10 1. 67 2. 00 2.
16.05.2024 27 2. 67 3. 33 6.
17.05.2024 29 2. 00 2. 67 2.
18.05.2024 12 3. 67 3. 33 2.
19.05.2024 9 1. 33 2. 67 1.
20.05.2024 7 1. 33 2. 67 2.
21.05.2024 9 2. 00 1. 67 1.
22.05.2024 7 2. 00 0. 67 0.

Middle Latitude

Data A Indici K
23.04.2024 9 0 2 3 2 3
24.04.2024 4 1 0 0 2 2 2 2 0
25.04.2024 3 0 0 0 1 2 2 1 1
26.04.2024 11 1 2 3 2 3 4 2 2
27.04.2024 12 3 3 2 1 3 3 3 2
28.04.2024 7 3 2 2 1 1 2 2 1
29.04.2024 7 1 1 2 2 2 2 3 2
30.04.2024 10 2 2 1 1 3 2 2 4
01.05.2024 10 3 3 2 1 2 2 3 2
02.05.2024 24 2 2 3 3 5 5 4 4
03.05.2024 16 3 2 1 1 2 1 6 2
04.05.2024 5 2 1 0 2 2 1 1 2
05.05.2024 12 2 1 3 3 3 2 3 3
06.05.2024 13 4 2 2 2 4 3 2 2
07.05.2024 6 1 1 1 2 3 2 2 1
08.05.2024 10 1 1 1 3 3 3 3 2
09.05.2024 7 1 1 1 2 2 3 2 2
10.05.2024 80 3 3 2 1 3 5 7 9
11.05.2024 75 9 8 7 8 7 6 6 6
12.05.2024 31 5 6 3 3 3 3 3 5
13.05.2024 24 5 5 4 3 3 3 2 3
14.05.2024 8 2 2 1 2 3 2 2 2
15.05.2024 10 1 2 3 2 3 2 3 2
16.05.2024 19 2 3 5 4 4 3 2 2
17.05.2024 16 2 2 2 2 3 4 4 4
18.05.2024 14 3 3 2 4 4 2 2 1
19.05.2024 10 1 3 0 3 3 2 3 2
20.05.2024 10 1 2 3 2 3 2 2 3
21.05.2024 8 2 1 1 2 3 3 2 1
22.05.2024 1 0 0 2

High Latitude

Data A Indici K
23.04.2024 11 2 2 2 4 4 0 2 1
24.04.2024 1 1 1 0 0 0 0 1 0
25.04.2024 0 0 0 0 0 0 0 0 0
26.04.2024 30 2 3 5 4 5 6 2 2
27.04.2024 14 3 2 2 1 5 2 3 2
28.04.2024 5 3 2 1 1 1 0 1 1
29.04.2024 7 2 1 2 3 3 1 2 0
30.04.2024 7 1 2 0 0 2 3 2 3
01.05.2024 6 3 2 2 0 1 1 2 1
02.05.2024 61 2 2 3 6 6 7 7 3
03.05.2024 10 4 3 2 3 1 0 2 1
04.05.2024 3 1 1 0 0 2 0 0 2
05.05.2024 11 2 1 2 5 0 0 2 3
06.05.2024 19 5 2 2 5 3 3 2 2
07.05.2024 8 2 2 1 3 3 2 1 2
08.05.2024 5 1 1 2 3 1 1 0 1
09.05.2024 4 1 2 0 2 1 0 2 1
10.05.2024 46 2 3 5 4 4 8 9 9
11.05.2024 08 8 6 9 9 6 5
12.05.2024 45 6 6 5 5 3 4 3 5
13.05.2024 35 5 6 5 5 3 3 3 2
14.05.2024 7 1 2 1 3 3 1 2 0
15.05.2024 10 2 2 3 3 3 2 2 2
16.05.2024 31 3 4 6 6 3 3 2 2
17.05.2024 33 2 3 2 1 4 6 6 5
18.05.2024 28 3 4 5 5 1
19.05.2024 13 2 2 2 4 4 3 2 1
20.05.2024 9 2 3 3 2 2 1 2 2
21.05.2024 15 2 2 1 5 4 3 2 2
22.05.2024 2 1 0 0

About

The K-index quantifies disturbances in the horizontal component of earth's magnetic field with an integer in the range 0–9 with 1 being calm and 5 or more indicating a geomagnetic storm. It is derived from the maximum fluctuations of horizontal components observed on a magnetometer during a three-hour interval. The label K comes from the German word Kennziffer meaning “characteristic digit”. The K-index was introduced by Julius Bartels in 1938.

The Estimated 3-hour Planetary Kp-index is derived at the NOAA Space Weather Prediction Center using data from the following ground-based magnetometers:

  • Sitka, Alaska
  • Meanook, Canada
  • Ottawa, Canada
  • Fredericksburg, Virginia
  • Hartland, UK
  • Wingst, Germany
  • Niemegk, Germany
  • Canberra, Australia

These data are made available thanks to the cooperative efforts between SWPC and data providers around the world, which currently includes the U.S. Geological Survey, Natural Resources Canada (NRCAN), the British Geological Survey, the German Research Centre for Geosciences (GFZ), and Geoscience Australia. Important magnetometer observations are also contributed by the Institut de Physique du Globe de Paris and the Korean Space Weather Center K-index Watches are issued when the highest predicted NOAA estimated Kp-indices for a day are K = 5, 6, 7, or >= 8 and is reported in terms of the NOAA G scale. K-index Warnings are issued when NOAA estimated Kp-indices of 4, 5, 6, and 7 or greater are expected. K-index Alerts are issued when the NOAA estimated Kp-indices reach 4, 5, 6, 7, 8, or 9.


More info
Origine dati: NOAA, Wikipedia

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Costante

Aumento

Diminuzione

Avviso

Latitudine

Longitudine

Cronologia

Eclissi solare

Eclissi di luna

GPS

Elevation

Giorno

Mese

Anno

Alta temperatura

Bassa temperatura

Giorno

Notte

Primavera

Estate

Autunno

Inverno