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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 3rd, 2025 9:52:03 am
Space Weather Message Code: ALTK05
- Serial Number: 1920
- Issue Time: 2025 Dec 03 1452 UTC
- ALERT: Geomagnetic K-index of 5
- Threshold Reached: 2025 Dec 03 1443 UTC
- Synoptic Period: 1200-1500 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 9:25:18 am
Space Weather Message Code: WARK05
- Serial Number: 2145
- Issue Time: 2025 Dec 03 1425 UTC
- WARNING: Geomagnetic K-index of 5 expected
- Valid From: 2025 Dec 03 1425 UTC
- Valid To: 2025 Dec 04 0000 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 3rd, 2025 9:23:34 am
Space Weather Message Code: ALTK04
- Serial Number: 2612
- Issue Time: 2025 Dec 03 1423 UTC
- ALERT: Geomagnetic K-index of 4
- Threshold Reached: 2025 Dec 03 1419 UTC
- Synoptic Period: 1200-1500 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 3rd, 2025 5:22:41 am
Space Weather Message Code: WARK04
- Serial Number: 5171
- Issue Time: 2025 Dec 03 1022 UTC
- WARNING: Geomagnetic K-index of 4 expected
- Valid From: 2025 Dec 03 1022 UTC
- Valid To: 2025 Dec 03 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.
Geophysical Alert Message Issued: Dec 3rd, 2025 2:06:26 am
Space Weather Message Code: ALTEF3
- Serial Number: 3570
- Issue Time: 2025 Dec 03 0706 UTC
- CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
- Continuation of Serial Number: 3569
- Begin Time: 2025 Nov 25 1450 UTC
- Yesterday Maximum 2MeV Flux: 8535 pfu
- Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Geophysical Alert Message Issued: Dec 2nd, 2025 12:01:21 am
Space Weather Message Code: ALTEF3
- Serial Number: 3569
- Issue Time: 2025 Dec 02 0501 UTC
- CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
- Continuation of Serial Number: 3568
- Begin Time: 2025 Nov 25 1450 UTC
- Yesterday Maximum 2MeV Flux: 8521 pfu
- Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Geophysical Alert Message Issued: Dec 1st, 2025 4:19:23 pm
Space Weather Message Code: WATA30
- Serial Number: 262
- Issue Time: 2025 Dec 01 2119 UTC
- WATCH: Geomagnetic Storm Category G2 Predicted
- Highest Storm Level Predicted by Day:
- Dec 02: None (Below G1) Dec 03: G2 (Moderate) Dec 04: G2 (Moderate)
- THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
- Comment: There is a chance geomagnetic storming could reach G3 (Moderate) levels late 03 Dec, into early 04 Dec.
- 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: Nov 30th, 2025 8:01:16 pm
Space Weather Message Code: ALTK04
- Serial Number: 2611
- Issue Time: 2025 Dec 01 0101 UTC
- ALERT: Geomagnetic K-index of 4
- Threshold Reached: 2025 Dec 01 0100 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: Nov 30th, 2025 9:41:43 pm
Space Weather Message Code: ALTXMF
- Serial Number: 502
- Issue Time: 2025 Dec 01 0241 UTC
- ALERT: X-Ray Flux exceeded M5
- Threshold Reached: 2025 Dec 01 0240 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: Nov 30th, 2025 9:56:13 pm
Space Weather Message Code: ALTTP2
- Serial Number: 1448
- Issue Time: 2025 Dec 01 0256 UTC
- ALERT: Type II Radio Emission
- Begin Time: 2025 Dec 01 0243 UTC
- Estimated Velocity: 988 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.
