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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 18th, 2026 7:50:14 pm
Space Weather Message Code: WARK05
- Serial Number: 2225
- Issue Time: 2026 Apr 18 2350 UTC
- WARNING: Geomagnetic K-index of 5 expected
- Valid From: 2026 Apr 18 2348 UTC
- Valid To: 2026 Apr 19 0900 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 18th, 2026 6:46:07 pm
Space Weather Message Code: WARK04
- Serial Number: 5319
- Issue Time: 2026 Apr 18 2246 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 5318
- Valid From: 2026 Apr 18 0157 UTC
- Now Valid Until: 2026 Apr 19 1200 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 18th, 2026 7:24:53 am
Space Weather Message Code: ALTK05
- Serial Number: 2009
- Issue Time: 2026 Apr 18 1124 UTC
- ALERT: Geomagnetic K-index of 5
- Threshold Reached: 2026 Apr 18 1124 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 18th, 2026 4:25:57 am
Space Weather Message Code: ALTK06
- Serial Number: 713
- Issue Time: 2026 Apr 18 0825 UTC
- ALERT: Geomagnetic K-index of 6
- Threshold Reached: 2026 Apr 18 0825 UTC
- Synoptic Period: 0600-0900 UTC
- Active Warning: Yes
- 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 18th, 2026 3:52:01 am
Space Weather Message Code: WARK06
- Serial Number: 654
- Issue Time: 2026 Apr 18 0752 UTC
- WARNING: Geomagnetic K-Index of 6 expected
- Valid From: 2026 Apr 18 0751 UTC
- Valid To: 2026 Apr 18 1500 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 18th, 2026 3:41:23 am
Space Weather Message Code: ALTK05
- Serial Number: 2008
- Issue Time: 2026 Apr 18 0741 UTC
- ALERT: Geomagnetic K-index of 5
- Threshold Reached: 2026 Apr 18 0740 UTC
- Synoptic Period: 0600-0900 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 18th, 2026 1:28:34 am
Space Weather Message Code: ALTK05
- Serial Number: 2007
- Issue Time: 2026 Apr 18 0528 UTC
- ALERT: Geomagnetic K-index of 5
- Threshold Reached: 2026 Apr 18 0525 UTC
- Synoptic Period: 0300-0600 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 18th, 2026 12:14:45 am
Space Weather Message Code: ALTK04
- Serial Number: 2650
- Issue Time: 2026 Apr 18 0414 UTC
- ALERT: Geomagnetic K-index of 4
- Threshold Reached: 2026 Apr 18 0414 UTC
- Synoptic Period: 0300-0600 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 17th, 2026 11:17:54 pm
Space Weather Message Code: WARK05
- Serial Number: 2224
- Issue Time: 2026 Apr 18 0317 UTC
- WARNING: Geomagnetic K-index of 5 expected
- Valid From: 2026 Apr 18 0317 UTC
- Valid To: 2026 Apr 18 1800 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 17th, 2026 9:58:19 pm
Space Weather Message Code: WARK04
- Serial Number: 5318
- Issue Time: 2026 Apr 18 0158 UTC
- WARNING: Geomagnetic K-index of 4 expected
- Valid From: 2026 Apr 18 0157 UTC
- Valid To: 2026 Apr 18 2359 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.
