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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, 2025 9:22:43 pm
Space Weather Message Code: ALTK05
- Serial Number: 1774
- Issue Time: 2025 May 29 0122 UTC
- ALERT: Geomagnetic K-index of 5
- Threshold Reached: 2025 May 29 0120 UTC
- Synoptic Period: 0000-0300 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: May 28th, 2025 9:26:56 pm
Space Weather Message Code: WARK06
- Serial Number: 582
- Issue Time: 2025 May 29 0126 UTC
- WARNING: Geomagnetic K-Index of 6 expected
- Valid From: 2025 May 29 0126 UTC
- Valid To: 2025 May 29 1500 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: May 28th, 2025 9:30:04 pm
Space Weather Message Code: ALTK06
- Serial Number: 630
- Issue Time: 2025 May 29 0130 UTC
- ALERT: Geomagnetic K-index of 6
- Threshold Reached: 2025 May 29 0129 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: May 28th, 2025 10:12:26 pm
Space Weather Message Code: WARK07
- Serial Number: 126
- Issue Time: 2025 May 29 0212 UTC
- WARNING: Geomagnetic K-index of 7 or greater expected
- Valid From: 2025 May 29 0211 UTC
- Valid To: 2025 May 29 0600 UTC
- Warning Condition: Onset
- NOAA Scale: G3 or greater
- 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: May 28th, 2025 10:16:27 pm
Space Weather Message Code: ALTK07
- Serial Number: 183
- Issue Time: 2025 May 29 0216 UTC
- ALERT: Geomagnetic K-index of 7
- Threshold Reached: 2025 May 29 0216 UTC
- Synoptic Period: 0000-0300 UTC
- Active Warning: Yes
- NOAA Scale: G3 - Strong
- 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: May 28th, 2025 9:13:27 pm
Space Weather Message Code: ALTK04
- Serial Number: 2563
- Issue Time: 2025 May 29 0113 UTC
- ALERT: Geomagnetic K-index of 4
- Threshold Reached: 2025 May 29 0110 UTC
- Synoptic Period: 0000-0300 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: May 28th, 2025 1:47:44 pm
Space Weather Message Code: WARK04
- Serial Number: 4975
- Issue Time: 2025 May 28 1747 UTC
- WARNING: Geomagnetic K-index of 4 expected
- Valid From: 2025 May 28 1747 UTC
- Valid To: 2025 May 29 0900 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: May 28th, 2025 1:01:31 am
Space Weather Message Code: WARK05
- Serial Number: 2046
- Issue Time: 2025 May 28 0501 UTC
- WARNING: Geomagnetic K-index of 5 expected
- Valid From: 2025 May 28 0501 UTC
- Valid To: 2025 May 28 1200 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: May 28th, 2025 1:02:02 am
Space Weather Message Code: WARK04
- Serial Number: 4974
- Issue Time: 2025 May 28 0502 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 4973
- Valid From: 2025 May 27 2004 UTC
- Now Valid Until: 2025 May 28 1500 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: May 27th, 2025 4:32:58 pm
Space Weather Message Code: ALTK04
- Serial Number: 2562
- Issue Time: 2025 May 27 2032 UTC
- ALERT: Geomagnetic K-index of 4
- Threshold Reached: 2025 May 27 2032 UTC
- Synoptic Period: 1800-2100 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.
