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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 23rd, 2026 2:31:56 am
Space Weather Message Code: ALTEF3
- Serial Number: 3693
- Issue Time: 2026 May 23 0631 UTC
- CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
- Continuation of Serial Number: 3692
- Begin Time: 2026-05-16 17:40
- Yesterday Maximum 2MeV Flux: 3762 pfu
- Continued 2026-05-23 06:31 by Forecaster User
- Continued 2026-05-23 06:31 by Forecaster User
Geophysical Alert Message Issued: May 22nd, 2026 1:07:16 am
Space Weather Message Code: ALTEF3
- Serial Number: 3692
- Issue Time: 2026 May 22 0507 UTC
- CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
- Continuation of Serial Number: 3691
- Begin Time: 2026-05-16 17:40
- Yesterday Maximum 2MeV Flux: 2842 pfu
- Continued 2026-05-22 05:06 by Forecaster User
- Continued 2026-05-22 05:06 by Forecaster User
Geophysical Alert Message Issued: May 21st, 2026 1:09:08 am
Space Weather Message Code: ALTEF3
- Serial Number: 3691
- Issue Time: 2026 May 21 0509 UTC
- CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
- Continuation of Serial Number: 3690
- Begin Time: 2026-05-16 17:40
- Yesterday Maximum 2MeV Flux: 1717 pfu
- Continued 2026-05-21 05:07 by Forecaster User
- Continued 2026-05-21 05:07 by Forecaster User
Geophysical Alert Message Issued: May 20th, 2026 6:06:55 am
Space Weather Message Code: ALTEF3
- Serial Number: 3690
- Issue Time: 2026 May 20 1006 UTC
- CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
- Continuation of Serial Number: 3689
- Begin Time: 2026-05-16 17:40
- Yesterday Maximum 2MeV Flux: 2860 pfu
- Continued 2026-05-20 10:06 by Forecaster User
- Continued 2026-05-20 10:06 by Forecaster User
Geophysical Alert Message Issued: May 19th, 2026 7:56:50 pm
Space Weather Message Code: WARK04
- Serial Number: 5346
- Issue Time: 2026 May 19 2356 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 5345
- Valid From: 2026-05-19T07:01:00
- Now Valid Until: 2026-05-20 06:00
- Warning Condition: Persistence
- Extended 2026-05-19 23:56 by Forecaster User
- Extended 2026-05-19 23:56 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 19th, 2026 4:57:51 pm
Space Weather Message Code: WARK04
- Serial Number: 5345
- Issue Time: 2026 May 19 2057 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 5344
- Valid From: 2026-05-19T07:01:00
- Now Valid Until: 2026-05-19 24:00
- Warning Condition: Persistence
- Extended 2026-05-19 20:57 by Forecaster User
- Extended 2026-05-19 20:57 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 19th, 2026 12:42:16 pm
Space Weather Message Code: WARK04
- Serial Number: 5344
- Issue Time: 2026 May 19 1642 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 5343
- Valid From: 2026-05-19T07:01:00
- Now Valid Until: 2026-05-19 21:00
- Warning Condition: Persistence
- Extended 2026-05-19 16:41 by Forecaster User
- Extended 2026-05-19 16:41 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 19th, 2026 4:55:28 am
Space Weather Message Code: ALTK04
- Serial Number: 2657
- Issue Time: 2026 May 19 0855 UTC
- ALERT: Geomagnetic K-index of 4
- Threshold Reached: 2026 May 19 0828 UTC
- Synoptic Period: 0600-0900
- 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 19th, 2026 3:03:03 am
Space Weather Message Code: WARK04
- Serial Number: 5343
- Issue Time: 2026 May 19 0703 UTC
- WARNING: Geomagnetic K-index of 4 expected
- Valid From: 2026 May 19 0701 UTC
- Valid To: 2026 May 19 1800 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 19th, 2026 1:14:59 am
Space Weather Message Code: ALTEF3
- Serial Number: 3689
- Issue Time: 2026 May 19 0514 UTC
- ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
- Threshold Reached: 2026 May 16 1740 UTC
- Station: GOES-19
- Comment: Yesterday's max: 6667 pfu
- Yesterday's max: 6667 pfu
