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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: Dec 18th, 2025 6:06:35 am
Space Weather Message Code: ALTEF3
- Serial Number: 3577
- Issue Time: 2025 Dec 18 1106 UTC
- CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
- Continuation of Serial Number: 3576
- Begin Time: 2025 Dec 17 1405 UTC
- Yesterday Maximum 2MeV Flux: 1632 pfu
- Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Geophysical Alert Message Issued: Dec 18th, 2025 12:56:55 am
Space Weather Message Code: WARK05
- Serial Number: 2157
- Issue Time: 2025 Dec 18 0556 UTC
- EXTENDED WARNING: Geomagnetic K-index of 5 expected
- Extension to Serial Number: 2156
- Valid From: 2025 Dec 17 2221 UTC
- Now Valid Until: 2025 Dec 18 1500 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 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: Dec 18th, 2025 12:57:15 am
Space Weather Message Code: WARK04
- Serial Number: 5188
- Issue Time: 2025 Dec 18 0557 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 5187
- Valid From: 2025 Dec 17 2044 UTC
- Now Valid Until: 2025 Dec 18 1800 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: Dec 17th, 2025 10:18:53 pm
Space Weather Message Code: WARK04
- Serial Number: 5187
- Issue Time: 2025 Dec 18 0318 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 5186
- Valid From: 2025 Dec 17 2044 UTC
- Now Valid Until: 2025 Dec 18 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: Dec 17th, 2025 7:02:36 pm
Space Weather Message Code: ALTK05
- Serial Number: 1931
- Issue Time: 2025 Dec 18 0002 UTC
- ALERT: Geomagnetic K-index of 5
- Threshold Reached: 2025 Dec 17 2330 UTC
- Synoptic Period: 2100-2400 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: Dec 17th, 2025 5:21:44 pm
Space Weather Message Code: WARK05
- Serial Number: 2156
- Issue Time: 2025 Dec 17 2221 UTC
- WARNING: Geomagnetic K-index of 5 expected
- Valid From: 2025 Dec 17 2221 UTC
- Valid To: 2025 Dec 18 0600 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: Dec 17th, 2025 3:50:39 pm
Space Weather Message Code: ALTK04
- Serial Number: 2616
- Issue Time: 2025 Dec 17 2050 UTC
- ALERT: Geomagnetic K-index of 4
- Threshold Reached: 2025 Dec 17 2050 UTC
- Synoptic Period: 1800-2100 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: Dec 17th, 2025 3:45:00 pm
Space Weather Message Code: WARK04
- Serial Number: 5186
- Issue Time: 2025 Dec 17 2045 UTC
- WARNING: Geomagnetic K-index of 4 expected
- Valid From: 2025 Dec 17 2044 UTC
- Valid To: 2025 Dec 18 0600 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: Dec 17th, 2025 10:06:03 am
Space Weather Message Code: ALTEF3
- Serial Number: 3576
- Issue Time: 2025 Dec 17 1506 UTC
- ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
- Threshold Reached: 2025 Dec 17 1405 UTC
- Station: GOES19
- Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Geophysical Alert Message Issued: Dec 16th, 2025 7:04:00 pm
Space Weather Message Code: WATA20
- Serial Number: 1082
- Issue Time: 2025 Dec 17 0004 UTC
- CANCEL WATCH: Geomagnetic Storm Category G1 Predicted
- Cancel Serial Number: 1081
- Original Issue Time: 2025 Dec 15 2245 UTC
- Comment: Conditions no longer warrant watch.
- 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.
