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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: May 28th, 2026 1:17:48 pm
Space Weather Message Code: ALTK04
- Serial Number: 2660
- Issue Time: 2026 May 28 1717 UTC
- CANCELLED ALERT: Geomagnetic K-index of 4
- Cancel Serial Number: 2659
- Original Issued Time: 2026-05-28T17:06:00
- Cancelled 2026-05-28 17:17 by Forecaster User Incorrectly issued. Did not reach threshold.
- Cancelled 2026-05-28 17:17 by Forecaster User Incorrectly issued. Did not reach threshold.
- 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: May 28th, 2026 1:06:50 pm
Space Weather Message Code: ALTK04
- Serial Number: 2659
- Issue Time: 2026 May 28 1706 UTC
- ALERT: Geomagnetic K-index of 4
- Threshold Reached: 2026 May 28 1706 UTC
- Synoptic Period: 1500-1800
- Active Warning: YES
- Comment:
- 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: May 28th, 2026 1:02:08 pm
Space Weather Message Code: WARK04
- Serial Number: 5352
- Issue Time: 2026 May 28 1702 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 5351
- Valid From: 2026-05-27T23:47:00
- Now Valid Until: 2026-05-29 03:00
- Warning Condition: Persistence
- Extended 2026-05-28 17:01 by Forecaster User
- Extended 2026-05-28 17:01 by Forecaster User
- 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: May 28th, 2026 7:45:15 am
Space Weather Message Code: WARK04
- Serial Number: 5351
- Issue Time: 2026 May 28 1145 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 5350
- Valid From: 2026-05-27T23:47:00
- Now Valid Until: 2026-05-28 18:00
- Warning Condition: Persistence
- Extended 2026-05-28 11:44 by Forecaster User
- Extended 2026-05-28 11:44 by Forecaster User
- 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: May 28th, 2026 1:17:14 am
Space Weather Message Code: WARK04
- Serial Number: 5350
- Issue Time: 2026 May 28 0517 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 5349
- Valid From: 2026-05-27T23:47:00
- Now Valid Until: 2026-05-28 12:00
- Warning Condition: Persistence
- Extended 2026-05-28 05:16 by Forecaster User
- Extended 2026-05-28 05:16 by Forecaster User
- 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: May 27th, 2026 7:47:33 pm
Space Weather Message Code: WARK04
- Serial Number: 5349
- Issue Time: 2026 May 27 2347 UTC
- WARNING: Geomagnetic K-index of 4 expected
- Valid From: 2026 May 27 2347 UTC
- Valid To: 2026 May 28 0600 UTC
- Warning Conditions: Onset
- Comment:
- 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: May 27th, 2026 10:45:02 am
Space Weather Message Code: SUMPX1
- Serial Number: 131
- Issue Time: 2026 May 27 1445 UTC
- CANCELLED SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
- Cancel Serial Number: 130
- Original Issued Time: 2026-05-27T02:28:00
- Cancelled 2026-05-27 14:44 by Forecaster User duplicate
- Cancelled 2026-05-27 14:44 by Forecaster User duplicateNOAA Scale: S1 - Minor
Geophysical Alert Message Issued: May 27th, 2026 1:47:17 am
Space Weather Message Code: WARK04
- Serial Number: 5348
- Issue Time: 2026 May 27 0547 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 5347
- Valid From: 2026-05-26T21:37:00
- Now Valid Until: 2026-05-27 12:00
- Warning Condition: Persistence
- Extended 2026-05-27 05:47 by Forecaster User
- Extended 2026-05-27 05:47 by Forecaster User
- 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: May 26th, 2026 10:27:49 pm
Space Weather Message Code: SUMPX1
- Serial Number: 129
- Issue Time: 2026 May 27 0227 UTC
- SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
- Begin Time: 2026 May 26 0015 UTC
- Maximum Time: 2026 May 26 0110 UTC
- End Time: 2026 May 26 0425 UTC
- Maximum 10MeV Flux: 23 pfu
- Noaa Scale: S1 - Minor
- Comment:
- NOAA Scale: S1 - Minor
Geophysical Alert Message Issued: May 26th, 2026 10:28:51 pm
Space Weather Message Code: SUMPX1
- Serial Number: 130
- Issue Time: 2026 May 27 0228 UTC
- SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
- Begin Time: 2026 May 27 0015 UTC
- Maximum Time: 2026 May 26 0110 UTC
- End Time: 2026 May 26 0425 UTC
- Maximum 10MeV Flux: 23 pfu
- Noaa Scale: S1 - Minor
- Comment:
- NOAA Scale: S1 - Minor
