Space Weather Alerts

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K04W 2025-04-30 11:30:52.640

  • Issued: Wed, 30 Apr 2025 11:30:52 +0000
  • Space Weather Message Code: WARK04
    Serial Number: 4941
    Issue Time: 2025 Apr 30 1130 UTC
    
    EXTENDED WARNING: Geomagnetic K-index of 4 expected
    Extension to Serial Number: 4940
    Valid From: 2025 Apr 30 0225 UTC
    Now Valid Until: 2025 Apr 30 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.                                

K04A 2025-04-30 03:00:30.910

  • Issued: Wed, 30 Apr 2025 03:00:30 +0000
  • Space Weather Message Code: ALTK04
    Serial Number: 2553
    Issue Time: 2025 Apr 30 0300 UTC
    
    ALERT: Geomagnetic K-index of 4
     Threshold Reached: 2025 Apr 30 0259 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.                                

K04W 2025-04-30 02:25:26.820

  • Issued: Wed, 30 Apr 2025 02:25:26 +0000
  • Space Weather Message Code: WARK04
    Serial Number: 4940
    Issue Time: 2025 Apr 30 0225 UTC
    
    WARNING: Geomagnetic K-index of 4 expected
    Valid From: 2025 Apr 30 0225 UTC
    Valid To: 2025 Apr 30 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.                                

EF3A 2025-04-27 16:32:51.453

  • Issued: Sun, 27 Apr 2025 16:32:51 +0000
  • Space Weather Message Code: ALTEF3
    Serial Number: 3455
    Issue Time: 2025 Apr 27 1632 UTC
    
    ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
    Threshold Reached: 2025 Apr 27 1605 UTC
    Station: GOES-19
     
    
    
    
    Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.                                

K04W 2025-04-24 17:16:22.717

  • Issued: Thu, 24 Apr 2025 17:16:22 +0000
  • Space Weather Message Code: WARK04
    Serial Number: 4939
    Issue Time: 2025 Apr 24 1716 UTC
    
    EXTENDED WARNING: Geomagnetic K-index of 4 expected
    Extension to Serial Number: 4938
    Valid From: 2025 Apr 24 0655 UTC
    Now Valid Until: 2025 Apr 25 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 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.                                

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