Space Weather Alerts

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K04W 2023-03-23 20:06:54.750

  • Issued: Thu, 23 Mar 2023 20:06:54 +0000
  • Space Weather Message Code: WARK04
    Serial Number: 4322
    Issue Time: 2023 Mar 23 2006 UTC
    
    EXTENDED WARNING: Geomagnetic K-index of 4 expected
    Extension to Serial Number: 4321
    Valid From: 2023 Mar 23 0827 UTC
    Now Valid Until: 2023 Mar 24 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.                                

K06W 2023-03-23 19:50:06.233

  • Issued: Thu, 23 Mar 2023 19:50:06 +0000
  • Space Weather Message Code: WARK06
    Serial Number: 476
    Issue Time: 2023 Mar 23 1950 UTC
    
    EXTENDED WARNING: Geomagnetic K-Index of 6 expected
    Extension to Serial Number: 475
    Valid From: 2023 Mar 23 1420 UTC
    Now Valid Until: 2023 Mar 24 0300 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.                                

K06A 2023-03-23 19:46:29.950

  • Issued: Thu, 23 Mar 2023 19:46:29 +0000
  • Space Weather Message Code: ALTK06
    Serial Number: 514
    Issue Time: 2023 Mar 23 1946 UTC
    
    ALERT: Geomagnetic K-index of 6
    Threshold Reached: 2023 Mar 23 1942 UTC
    Synoptic Period: 1800-2100 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.                                

K05A 2023-03-23 17:25:34.897

  • Issued: Thu, 23 Mar 2023 17:25:34 +0000
  • Space Weather Message Code: ALTK05
    Serial Number: 1444
    Issue Time: 2023 Mar 23 1725 UTC
    
    ALERT: Geomagnetic K-index of 5
    Threshold Reached: 2023 Mar 23 1722 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.                                

K07A 2023-03-23 15:31:21.737

  • Issued: Thu, 23 Mar 2023 15:31:21 +0000
  • Space Weather Message Code: ALTK07
    Serial Number: 125
    Issue Time: 2023 Mar 23 1531 UTC
    
    ALERT: Geomagnetic K-index of 7
    Threshold Reached: 2023 Mar 23 1449 UTC
    Synoptic Period: 1500-1800 UTC
     
    Active Warning: Yes
    NOAA Scale: G3 - Strong
    
    Comment: This alert is a correction. G3 conditions were first observed at 1449 UTC and not 1446 UTC as previously alerted on 23 Mar 2023 at 1450 UTC. This alert supercedes all previous G3 alerts.
    
    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.                                

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