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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 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.
Geophysical Alert Message Issued: Nov 30th, 2025 10:14:38 pm
Space Weather Message Code: SUMX01
- Serial Number: 203
- Issue Time: 2025 Dec 01 0314 UTC
- SUMMARY: X-ray Event exceeded X1
- Begin Time: 2025 Dec 01 0227 UTC
- Maximum Time: 2025 Dec 01 0249 UTC
- End Time: 2025 Dec 01 0305 UTC
- X-ray Class: X1.9
- Location: N22E85
- NOAA Scale: R3 - Strong
- NOAA Space Weather Scale descriptions can be found at
- www.swpc.noaa.gov/noaa-scales-explanation
- Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
- Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.
Geophysical Alert Message Issued: Nov 30th, 2025 11:03:30 pm
Space Weather Message Code: ALTTP2
- Serial Number: 1449
- Issue Time: 2025 Dec 01 0403 UTC
- ALERT: Type II Radio Emission
- Begin Time: 2025 Dec 01 0319 UTC
- Estimated Velocity: 490 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: Nov 30th, 2025 11:59:40 pm
Space Weather Message Code: ALTEF3
- Serial Number: 3568
- Issue Time: 2025 Dec 01 0459 UTC
- CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
- Continuation of Serial Number: 3567
- Begin Time: 2025 Nov 25 1450 UTC
- Yesterday Maximum 2MeV Flux: 8310 pfu
- Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Geophysical Alert Message Issued: Nov 30th, 2025 7:54:50 pm
Space Weather Message Code: WARK04
- Serial Number: 5170
- Issue Time: 2025 Dec 01 0054 UTC
- WARNING: Geomagnetic K-index of 4 expected
- Valid From: 2025 Dec 01 0053 UTC
- Valid To: 2025 Dec 01 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: Nov 29th, 2025 11:59:53 pm
Space Weather Message Code: ALTEF3
- Serial Number: 3567
- Issue Time: 2025 Nov 30 0459 UTC
- CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
- Continuation of Serial Number: 3566
- Begin Time: 2025 Nov 25 1450 UTC
- Yesterday Maximum 2MeV Flux: 23005 pfu
- Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
