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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 10th, 2025 4:57:48 pm
Space Weather Message Code: WARK06
- Serial Number: 628
- Issue Time: 2025 Dec 10 2157 UTC
- WARNING: Geomagnetic K-Index of 6 expected
- Valid From: 2025 Dec 10 2200 UTC
- Valid To: 2025 Dec 11 0300 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: Dec 10th, 2025 4:20:24 pm
Space Weather Message Code: ALTK04
- Serial Number: 2615
- Issue Time: 2025 Dec 10 2120 UTC
- ALERT: Geomagnetic K-index of 4
- Threshold Reached: 2025 Dec 10 2111 UTC
- Synoptic Period: 2100-2400 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 10th, 2025 4:17:01 pm
Space Weather Message Code: WARK05
- Serial Number: 2149
- Issue Time: 2025 Dec 10 2117 UTC
- WARNING: Geomagnetic K-index of 5 expected
- Valid From: 2025 Dec 10 2115 UTC
- Valid To: 2025 Dec 11 0300 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 10th, 2025 3:40:06 pm
Space Weather Message Code: WARK04
- Serial Number: 5178
- Issue Time: 2025 Dec 10 2040 UTC
- WARNING: Geomagnetic K-index of 4 expected
- Valid From: 2025 Dec 10 2040 UTC
- Valid To: 2025 Dec 11 0300 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 10th, 2025 2:08:08 am
Space Weather Message Code: WARK04
- Serial Number: 5177
- Issue Time: 2025 Dec 10 0708 UTC
- WARNING: Geomagnetic K-index of 4 expected
- Valid From: 2025 Dec 10 0707 UTC
- Valid To: 2025 Dec 10 1500 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 9th, 2025 4:03:48 pm
Space Weather Message Code: WATA50
- Serial Number: 95
- Issue Time: 2025 Dec 09 2103 UTC
- CANCEL WATCH: Geomagnetic Storm Category G3 Predicted
- Cancel Serial Number: 94
- Original Issue Time: 2025 Dec 07 0443 UTC
- Comment: Enhancement from anticipated CME did not occur
- NOAA Space Weather Scale descriptions can be found at
- www.swpc.noaa.gov/noaa-scales-explanation
- Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
- Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
- Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
- Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
- Radio - HF (high frequency) radio may be intermittent.
- Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Geophysical Alert Message Issued: Dec 9th, 2025 7:10:16 am
Space Weather Message Code: ALTEF3
- Serial Number: 3575
- Issue Time: 2025 Dec 09 1210 UTC
- CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
- Continuation of Serial Number: 3574
- Begin Time: 2025 Dec 05 1530 UTC
- Yesterday Maximum 2MeV Flux: 1040 pfu
- Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Geophysical Alert Message Issued: Dec 8th, 2025 9:15:14 pm
Space Weather Message Code: ALTTP2
- Serial Number: 1454
- Issue Time: 2025 Dec 09 0215 UTC
- ALERT: Type II Radio Emission
- Begin Time: 2025 Dec 09 0152 UTC
- Estimated Velocity: 759 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 8th, 2025 9:56:16 pm
Space Weather Message Code: ALTTP4
- Serial Number: 699
- Issue Time: 2025 Dec 09 0256 UTC
- ALERT: Type IV Radio Emission
- Begin Time: 2025 Dec 09 0220 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 8th, 2025 9:04:31 pm
Space Weather Message Code: ALTTP2
- Serial Number: 1453
- Issue Time: 2025 Dec 09 0204 UTC
- ALERT: Type II Radio Emission
- Begin Time: 2025 Dec 09 0141 UTC
- Estimated Velocity: 1825 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.
