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Having SatCom problems?
A burst of radiation on the sun's surface may trigger a geomagnetic storm, which can disrupt satellite communications.
In order to prevent unnecessary maintenance on satellite communications systems Air Sat One has provided a feed of Geophysical Events from NOAA's Space Weather Prediction Center. Check here to see if solar activity could be a cause of satellite communications problems.
Geophysical Alert Message Issued: Apr 21st, 2025 9:54:04 am
Space Weather Message Code: WARK06
- Serial Number: 577
- Issue Time: 2025 Apr 21 1354 UTC
- WARNING: Geomagnetic K-Index of 6 expected
- Valid From: 2025 Apr 21 1353 UTC
- Valid To: 2025 Apr 21 1800 UTC
- Warning Condition: Onset
- NOAA Scale: G2 - Moderate
- NOAA Space Weather Scale descriptions can be found at
- www.swpc.noaa.gov/noaa-scales-explanation
- 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.
Geophysical Alert Message Issued: Apr 21st, 2025 7:46:30 am
Space Weather Message Code: ALTK05
- Serial Number: 1754
- Issue Time: 2025 Apr 21 1146 UTC
- ALERT: Geomagnetic K-index of 5
- Threshold Reached: 2025 Apr 21 1142 UTC
- Synoptic Period: 0900-1200 UTC
- Active Warning: Yes
- NOAA Scale: G1 - Minor
- NOAA Space Weather Scale descriptions can be found at
- www.swpc.noaa.gov/noaa-scales-explanation
- 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.
Geophysical Alert Message Issued: Apr 21st, 2025 6:10:45 am
Space Weather Message Code: WARK05
- Serial Number: 2026
- Issue Time: 2025 Apr 21 1010 UTC
- WARNING: Geomagnetic K-index of 5 expected
- Valid From: 2025 Apr 21 1010 UTC
- Valid To: 2025 Apr 21 2359 UTC
- Warning Condition: Onset
- NOAA Scale: G1 - Minor
- NOAA Space Weather Scale descriptions can be found at
- www.swpc.noaa.gov/noaa-scales-explanation
- 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.
Geophysical Alert Message Issued: Apr 21st, 2025 5:34:42 am
Space Weather Message Code: WARK04
- Serial Number: 4935
- Issue Time: 2025 Apr 21 0934 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 4934
- Valid From: 2025 Apr 21 0218 UTC
- Now Valid Until: 2025 Apr 21 2359 UTC
- Warning Condition: Persistence
- NOAA Space Weather Scale descriptions can be found at
- www.swpc.noaa.gov/noaa-scales-explanation
- 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.
Geophysical Alert Message Issued: Apr 20th, 2025 10:18:58 pm
Space Weather Message Code: WARK04
- Serial Number: 4934
- Issue Time: 2025 Apr 21 0218 UTC
- WARNING: Geomagnetic K-index of 4 expected
- Valid From: 2025 Apr 21 0218 UTC
- Valid To: 2025 Apr 21 1200 UTC
- Warning Condition: Onset
- NOAA Space Weather Scale descriptions can be found at
- www.swpc.noaa.gov/noaa-scales-explanation
- 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.
Geophysical Alert Message Issued: Apr 20th, 2025 10:25:17 pm
Space Weather Message Code: ALTK04
- Serial Number: 2551
- Issue Time: 2025 Apr 21 0225 UTC
- ALERT: Geomagnetic K-index of 4
- Threshold Reached: 2025 Apr 21 0224 UTC
- Synoptic Period: 0000-0300 UTC
- Active Warning: Yes
- NOAA Space Weather Scale descriptions can be found at
- www.swpc.noaa.gov/noaa-scales-explanation
- 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.
Geophysical Alert Message Issued: Apr 20th, 2025 9:48:24 pm
Space Weather Message Code: WATA30
- Serial Number: 251
- Issue Time: 2025 Apr 21 0148 UTC
- WATCH: Geomagnetic Storm Category G2 Predicted
- Highest Storm Level Predicted by Day:
- Apr 21: None (Below G1) Apr 22: G2 (Moderate) Apr 23: G2 (Moderate)
- THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
- NOAA Space Weather Scale descriptions can be found at
- www.swpc.noaa.gov/noaa-scales-explanation
- 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.
Geophysical Alert Message Issued: Apr 19th, 2025 8:38:52 pm
Space Weather Message Code: WARK05
- Serial Number: 2025
- Issue Time: 2025 Apr 20 0038 UTC
- WARNING: Geomagnetic K-index of 5 expected
- Valid From: 2025 Apr 20 0038 UTC
- Valid To: 2025 Apr 20 1200 UTC
- Warning Condition: Onset
- NOAA Scale: G1 - Minor
- NOAA Space Weather Scale descriptions can be found at
- www.swpc.noaa.gov/noaa-scales-explanation
- 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.
Geophysical Alert Message Issued: Apr 19th, 2025 8:41:44 pm
Space Weather Message Code: ALTK04
- Serial Number: 2550
- Issue Time: 2025 Apr 20 0041 UTC
- ALERT: Geomagnetic K-index of 4
- Threshold Reached: 2025 Apr 20 0038 UTC
- Synoptic Period: 0000-0300 UTC
- Active Warning: Yes
- NOAA Space Weather Scale descriptions can be found at
- www.swpc.noaa.gov/noaa-scales-explanation
- 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.
Geophysical Alert Message Issued: Apr 19th, 2025 8:56:58 pm
Space Weather Message Code: ALTK05
- Serial Number: 1753
- Issue Time: 2025 Apr 20 0056 UTC
- ALERT: Geomagnetic K-index of 5
- Threshold Reached: 2025 Apr 20 0055 UTC
- Synoptic Period: 0000-0300 UTC
- Active Warning: Yes
- NOAA Scale: G1 - Minor
- NOAA Space Weather Scale descriptions can be found at
- www.swpc.noaa.gov/noaa-scales-explanation
- 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.
