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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 4th, 2025 4:00:55 am
Space Weather Message Code: ALTTP4
- Serial Number: 697
- Issue Time: 2025 Dec 04 0900 UTC
- ALERT: Type IV Radio Emission
- Begin Time: 2025 Dec 04 0832 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.
Geophysical Alert Message Issued: Dec 4th, 2025 3:55:33 am
Space Weather Message Code: ALTK05
- Serial Number: 1925
- Issue Time: 2025 Dec 04 0855 UTC
- ALERT: Geomagnetic K-index of 5
- Threshold Reached: 2025 Dec 04 0852 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: Dec 3rd, 2025 10:03:55 pm
Space Weather Message Code: ALTTP2
- Serial Number: 1450
- Issue Time: 2025 Dec 04 0303 UTC
- ALERT: Type II Radio Emission
- Begin Time: 2025 Dec 04 0246 UTC
- Estimated Velocity: 345 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.
Geophysical Alert Message Issued: Dec 3rd, 2025 10:08:15 pm
Space Weather Message Code: SUMXM5
- Serial Number: 300
- Issue Time: 2025 Dec 04 0308 UTC
- SUMMARY: X-ray Event exceeded M5
- Begin Time: 2025 Dec 04 0236 UTC
- Maximum Time: 2025 Dec 04 0250 UTC
- End Time: 2025 Dec 04 0259 UTC
- X-ray Class: M6.0
- Optical Class: na
- Location: N07E50
- NOAA Scale: R2 - Moderate
- NOAA Space Weather Scale descriptions can be found at
- www.swpc.noaa.gov/noaa-scales-explanation
- 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.
Geophysical Alert Message Issued: Dec 3rd, 2025 11:53:02 pm
Space Weather Message Code: ALTK05
- Serial Number: 1924
- Issue Time: 2025 Dec 04 0453 UTC
- ALERT: Geomagnetic K-index of 5
- Threshold Reached: 2025 Dec 04 0445 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: Dec 3rd, 2025 9:50:48 pm
Space Weather Message Code: ALTXMF
- Serial Number: 503
- Issue Time: 2025 Dec 04 0250 UTC
- ALERT: X-Ray Flux exceeded M5
- Threshold Reached: 2025 Dec 04 0248 UTC
- NOAA Scale: R2 - Moderate
- NOAA Space Weather Scale descriptions can be found at
- www.swpc.noaa.gov/noaa-scales-explanation
- 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.
Geophysical Alert Message Issued: Dec 3rd, 2025 9:53:00 pm
Space Weather Message Code: ALTK05
- Serial Number: 1923
- Issue Time: 2025 Dec 04 0253 UTC
- ALERT: Geomagnetic K-index of 5
- Threshold Reached: 2025 Dec 04 0247 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.
Geophysical Alert Message Issued: Dec 3rd, 2025 6:55:43 pm
Space Weather Message Code: WARK04
- Serial Number: 5172
- Issue Time: 2025 Dec 03 2355 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 5171
- Valid From: 2025 Dec 03 1022 UTC
- Now Valid Until: 2025 Dec 04 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 3rd, 2025 6:56:23 pm
Space Weather Message Code: WARK05
- Serial Number: 2146
- Issue Time: 2025 Dec 03 2356 UTC
- EXTENDED WARNING: Geomagnetic K-index of 5 expected
- Extension to Serial Number: 2145
- Valid From: 2025 Dec 03 1425 UTC
- Now Valid Until: 2025 Dec 04 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 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 3rd, 2025 5:38:06 pm
Space Weather Message Code: ALTK05
- Serial Number: 1922
- Issue Time: 2025 Dec 03 2238 UTC
- ALERT: Geomagnetic K-index of 5
- Threshold Reached: 2025 Dec 03 2215 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.
