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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: Apr 26th, 2026 7:00:55 pm
Space Weather Message Code: ALTXMF
- Serial Number: 526
- Issue Time: 2026 Apr 26 2300 UTC
- ALERT: X-Ray Flux exceeded M5
- Threshold Reached: 2026 Apr 26 2257 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: Apr 26th, 2026 7:47:56 am
Space Weather Message Code: WARK04
- Serial Number: 5329
- Issue Time: 2026 Apr 26 1147 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 5328
- Valid From: 2026 Apr 26 0359 UTC
- Now Valid Until: 2026 Apr 26 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: Apr 26th, 2026 1:59:50 am
Space Weather Message Code: ALTK04
- Serial Number: 2652
- Issue Time: 2026 Apr 26 0559 UTC
- ALERT: Geomagnetic K-index of 4
- Threshold Reached: 2026 Apr 26 0559 UTC
- Synoptic Period: 0300-0600 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: Apr 26th, 2026 2:01:29 am
Space Weather Message Code: WARK04
- Serial Number: 5328
- Issue Time: 2026 Apr 26 0601 UTC
- WARNING: Geomagnetic K-index of 4 expected
- Valid From: 2026 Apr 26 0359 UTC
- Valid To: 2026 Apr 26 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: Apr 24th, 2026 9:37:16 pm
Space Weather Message Code: WARK04
- Serial Number: 5327
- Issue Time: 2026 Apr 25 0137 UTC
- WARNING: Geomagnetic K-index of 4 expected
- Valid From: 2026 Apr 25 0137 UTC
- Valid To: 2026 Apr 25 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: Apr 24th, 2026 7:50:43 pm
Space Weather Message Code: WATA20
- Serial Number: 1109
- Issue Time: 2026 Apr 24 2350 UTC
- WATCH: Geomagnetic Storm Category G1 Predicted
- Highest Storm Level Predicted by Day:
- Apr 25: G1 (Minor) Apr 26: G1 (Minor) Apr 27: None (Below G1)
- THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
- 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: Apr 24th, 2026 2:35:25 pm
Space Weather Message Code: SUMXM5
- Serial Number: 313
- Issue Time: 2026 Apr 24 1835 UTC
- SUMMARY: X-ray Event exceeded M5
- Begin Time: 2026 Apr 24 1754 UTC
- Maximum Time: 2026 Apr 24 1815 UTC
- End Time: 2026 Apr 24 1830 UTC
- X-ray Class: M6.4
- Location: N19W90
- 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: Apr 24th, 2026 2:12:55 pm
Space Weather Message Code: ALTXMF
- Serial Number: 525
- Issue Time: 2026 Apr 24 1812 UTC
- ALERT: X-Ray Flux exceeded M5
- Threshold Reached: 2026 Apr 24 1812 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: Apr 24th, 2026 6:42:00 am
Space Weather Message Code: ALTTP4
- Serial Number: 707
- Issue Time: 2026 Apr 24 1041 UTC
- ALERT: Type IV Radio Emission
- Begin Time: 2026 Apr 24 0840 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: Apr 24th, 2026 5:27:04 am
Space Weather Message Code: ALTTP2
- Serial Number: 1478
- Issue Time: 2026 Apr 24 0927 UTC
- CANCEL ALERT: Type II Radio Emission
- Cancel Serial Number: 1477
- Original Issue Time: 2026 Apr 24 0857 UTC
- Comment: Reissuing with corrected shock speed.
- 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.
