Space Weather Alerts

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MSIS 2023-04-23 18:34:42.847

  • Issued: Sun, 23 Apr 2023 18:34:42 +0000
  • Space Weather Message Code: SUMSUD
    Serial Number: 247
    Issue Time: 2023 Apr 23 1834 UTC
    
    SUMMARY: Geomagnetic Sudden Impulse
    Observed: 2023 Apr 23 1737 UTC
    Deviation: 48 nT
    Station: BOU
    
    NOAA Space Weather Scale descriptions can be found at
    www.swpc.noaa.gov/noaa-scales-explanation                                

P11W 2023-04-23 18:31:18.240

  • Issued: Sun, 23 Apr 2023 18:31:18 +0000
  • Space Weather Message Code: WARPX1
    Serial Number: 499
    Issue Time: 2023 Apr 23 1831 UTC
    
    WARNING: Proton 10MeV Integral Flux above 10pfu expected
    Valid From: 2023 Apr 23 1815 UTC
    Valid To: 2023 Apr 24 0900 UTC
    Warning Condition: Onset
    Predicted NOAA Scale: S1 - Minor
    
    NOAA Space Weather Scale descriptions can be found at
    www.swpc.noaa.gov/noaa-scales-explanation
    
    Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.                                

K06W 2023-04-23 18:29:41.603

  • Issued: Sun, 23 Apr 2023 18:29:41 +0000
  • Space Weather Message Code: WARK06
    Serial Number: 479
    Issue Time: 2023 Apr 23 1829 UTC
    
    WARNING: Geomagnetic K-Index of 6 expected
    Valid From: 2023 Apr 23 1830 UTC
    Valid To: 2023 Apr 24 0600 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.                                

P11A 2023-04-23 18:28:50.627

  • Issued: Sun, 23 Apr 2023 18:28:50 +0000
  • Space Weather Message Code: ALTPX1
    Serial Number: 328
    Issue Time: 2023 Apr 23 1828 UTC
    
    ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
    Begin Time: 2023 Apr 23 1815 UTC
    NOAA Scale: S1 - Minor
    
    NOAA Space Weather Scale descriptions can be found at
    www.swpc.noaa.gov/noaa-scales-explanation
    
    Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.                                

K05A 2023-04-23 18:00:19.797

  • Issued: Sun, 23 Apr 2023 18:00:19 +0000
  • Space Weather Message Code: ALTK05
    Serial Number: 1452
    Issue Time: 2023 Apr 23 1800 UTC
    
    ALERT: Geomagnetic K-index of 5
    Threshold Reached: 2023 Apr 23 1759 UTC
    Synoptic Period: 1500-1800 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.                                

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