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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 12th, 2025 12:58:53 am
Space Weather Message Code: ALTTP4
- Serial Number: 700
- Issue Time: 2025 Dec 12 0558 UTC
- ALERT: Type IV Radio Emission
- Begin Time: 2025 Dec 12 0527 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 12th, 2025 12:28:52 am
Space Weather Message Code: ALTTP2
- Serial Number: 1456
- Issue Time: 2025 Dec 12 0528 UTC
- ALERT: Type II Radio Emission
- Begin Time: 2025 Dec 12 0508 UTC
- Estimated Velocity: 410 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 11th, 2025 6:39:54 pm
Space Weather Message Code: WARK04
- Serial Number: 5181
- Issue Time: 2025 Dec 11 2339 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 5180
- Valid From: 2025 Dec 10 2040 UTC
- Now Valid Until: 2025 Dec 12 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 11th, 2025 3:59:38 pm
Space Weather Message Code: ALTK05
- Serial Number: 1927
- Issue Time: 2025 Dec 11 2059 UTC
- ALERT: Geomagnetic K-index of 5
- Threshold Reached: 2025 Dec 11 1914 UTC
- Synoptic Period: 1800-2100 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 11th, 2025 2:19:46 pm
Space Weather Message Code: WARK05
- Serial Number: 2152
- Issue Time: 2025 Dec 11 1919 UTC
- WARNING: Geomagnetic K-index of 5 expected
- Valid From: 2025 Dec 11 1900 UTC
- Valid To: 2025 Dec 12 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 10th, 2025 7:16:10 pm
Space Weather Message Code: SUM10R
- Serial Number: 895
- Issue Time: 2025 Dec 11 0016 UTC
- SUMMARY: 10cm Radio Burst
- Begin Time: 2025 Dec 10 2206 UTC
- Maximum Time: 2025 Dec 10 2206 UTC
- End Time: 2025 Dec 10 2208 UTC
- Duration: 2 minutes
- Peak Flux: 520 sfu
- Latest Penticton Noon Flux: 168 sfu
- Comment: This summary contains the corrected peak flux of 520 sfu
- Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.
Geophysical Alert Message Issued: Dec 10th, 2025 9:52:48 pm
Space Weather Message Code: ALTK06
- Serial Number: 679
- Issue Time: 2025 Dec 11 0252 UTC
- ALERT: Geomagnetic K-index of 6
- Threshold Reached: 2025 Dec 11 0242 UTC
- Synoptic Period: 0000-0300 UTC
- Active Warning: Yes
- 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 9:55:23 pm
Space Weather Message Code: WARK06
- Serial Number: 629
- Issue Time: 2025 Dec 11 0255 UTC
- EXTENDED WARNING: Geomagnetic K-Index of 6 expected
- Extension to Serial Number: 628
- Valid From: 2025 Dec 10 2200 UTC
- Now Valid Until: 2025 Dec 11 0600 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 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 10:37:55 pm
Space Weather Message Code: WARK04
- Serial Number: 5180
- Issue Time: 2025 Dec 11 0337 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 5179
- Valid From: 2025 Dec 10 2040 UTC
- Now Valid Until: 2025 Dec 11 2359 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 10th, 2025 10:39:00 pm
Space Weather Message Code: WARK05
- Serial Number: 2151
- Issue Time: 2025 Dec 11 0339 UTC
- EXTENDED WARNING: Geomagnetic K-index of 5 expected
- Extension to Serial Number: 2150
- Valid From: 2025 Dec 10 2115 UTC
- Now Valid Until: 2025 Dec 11 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.
