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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 18th, 2025 8:07:49 pm
Space Weather Message Code: ALTTP2
- Serial Number: 1411
- Issue Time: 2025 Apr 19 0007 UTC
- ALERT: Type II Radio Emission
- Begin Time: 2025 Apr 18 2345 UTC
- Estimated Velocity: 349 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: Apr 18th, 2025 12:48:00 am
Space Weather Message Code: WARK05
- Serial Number: 2024
- Issue Time: 2025 Apr 18 0448 UTC
- WARNING: Geomagnetic K-index of 5 expected
- Valid From: 2025 Apr 18 0447 UTC
- Valid To: 2025 Apr 18 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: Apr 18th, 2025 12:02:11 am
Space Weather Message Code: ALTK04
- Serial Number: 2548
- Issue Time: 2025 Apr 18 0402 UTC
- ALERT: Geomagnetic K-index of 4
- Threshold Reached: 2025 Apr 18 0357 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 17th, 2025 9:52:45 pm
Space Weather Message Code: WARK04
- Serial Number: 4930
- Issue Time: 2025 Apr 18 0152 UTC
- WARNING: Geomagnetic K-index of 4 expected
- Valid From: 2025 Apr 18 0152 UTC
- Valid To: 2025 Apr 18 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 17th, 2025 6:12:19 am
Space Weather Message Code: WARK04
- Serial Number: 4929
- Issue Time: 2025 Apr 17 1012 UTC
- EXTENDED WARNING: Geomagnetic K-index of 4 expected
- Extension to Serial Number: 4928
- Valid From: 2025 Apr 15 1705 UTC
- Now Valid Until: 2025 Apr 17 1800 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 16th, 2025 7:13:00 pm
Space Weather Message Code: WARK05
- Serial Number: 2023
- Issue Time: 2025 Apr 16 2313 UTC
- EXTENDED WARNING: Geomagnetic K-index of 5 expected
- Extension to Serial Number: 2022
- Valid From: 2025 Apr 15 1730 UTC
- Now Valid Until: 2025 Apr 17 0900 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.
Geophysical Alert Message Issued: Apr 16th, 2025 7:13:52 pm
Space Weather Message Code: WARK06
- Serial Number: 576
- Issue Time: 2025 Apr 16 2313 UTC
- EXTENDED WARNING: Geomagnetic K-Index of 6 expected
- Extension to Serial Number: 575
- Valid From: 2025 Apr 16 1315 UTC
- Now Valid Until: 2025 Apr 17 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: Apr 16th, 2025 5:40:58 pm
Space Weather Message Code: ALTK05
- Serial Number: 1752
- Issue Time: 2025 Apr 16 2140 UTC
- ALERT: Geomagnetic K-index of 5
- Threshold Reached: 2025 Apr 16 2136 UTC
- Synoptic Period: 2100-2400 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: Apr 16th, 2025 4:54:57 pm
Space Weather Message Code: ALTK08
- Serial Number: 50
- Issue Time: 2025 Apr 16 2054 UTC
- ALERT: Geomagnetic K-index of 8, 9-
- Threshold Reached: 2025 Apr 16 2055 UTC
- Synoptic Period: 1800-2100 UTC
- Active Warning: Yes
- NOAA Scale: G4 - Severe
- NOAA Space Weather Scale descriptions can be found at
- www.swpc.noaa.gov/noaa-scales-explanation
- Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
- Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
- Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
- Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
- Radio - HF (high frequency) radio propagation sporadic or blacked out.
- Aurora - Aurora may be seen as low as Alabama and northern California.
Geophysical Alert Message Issued: Apr 16th, 2025 3:31:29 pm
Space Weather Message Code: WARK07
- Serial Number: 125
- Issue Time: 2025 Apr 16 1931 UTC
- WARNING: Geomagnetic K-index of 7 or greater expected
- Valid From: 2025 Apr 16 1930 UTC
- Valid To: 2025 Apr 17 0000 UTC
- Warning Condition: Persistence
- 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.
