Local 2/24/2026, 11:55:03 AM
UTC 2026-02-24T11:55:03.900Z
Space Weather Message Code: WARK04Serial Number: 5270Issue Time: 2026 Feb 24 1155 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5269Valid From: 2026 Feb 21 2230 UTCNow Valid Until: 2026 Feb 24 2100 UTCWarning Condition: PersistenceNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 2/24/2026, 5:02:02 AM
UTC 2026-02-24T05:02:02.687Z
Space Weather Message Code: ALTEF3Serial Number: 3633Issue Time: 2026 Feb 24 0502 UTCCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfuContinuation of Serial Number: 3632Begin Time: 2026 Feb 23 1045 UTCYesterday Maximum 2MeV Flux: 4958 pfuPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 2/23/2026, 10:05:19 PM
UTC 2026-02-23T22:05:19.380Z
Space Weather Message Code: WARK04Serial Number: 5269Issue Time: 2026 Feb 23 2205 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5268Valid From: 2026 Feb 21 2230 UTCNow Valid Until: 2026 Feb 24 1200 UTCWarning Condition: PersistenceNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 2/23/2026, 9:39:45 PM
UTC 2026-02-23T21:39:45.773Z
Space Weather Message Code: WARK05Serial Number: 2200Issue Time: 2026 Feb 23 2139 UTCWARNING: Geomagnetic K-index of 5 expectedValid From: 2026 Feb 23 2140 UTCValid To: 2026 Feb 24 0600 UTCWarning Condition: OnsetNOAA Scale: G1 - MinorNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 2/23/2026, 11:34:57 AM
UTC 2026-02-23T11:34:57.033Z
Space Weather Message Code: ALTEF3Serial Number: 3632Issue Time: 2026 Feb 23 1134 UTCALERT: Electron 2MeV Integral Flux exceeded 1000pfuThreshold Reached: 2026 Feb 23 1045 UTCStation: GOES19Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 2/23/2026, 5:56:31 AM
UTC 2026-02-23T05:56:31.393Z
Space Weather Message Code: WARK05Serial Number: 2199Issue Time: 2026 Feb 23 0556 UTCEXTENDED WARNING: Geomagnetic K-index of 5 expectedExtension to Serial Number: 2198Valid From: 2026 Feb 22 2154 UTCNow Valid Until: 2026 Feb 23 1500 UTCWarning Condition: PersistenceNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 2/23/2026, 5:56:31 AM
UTC 2026-02-23T05:56:31.393Z
Space Weather Message Code: WARK04Serial Number: 5268Issue Time: 2026 Feb 23 0556 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5267Valid From: 2026 Feb 21 2230 UTCNow Valid Until: 2026 Feb 23 2359 UTCWarning Condition: PersistenceNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 2/23/2026, 4:45:12 AM
UTC 2026-02-23T04:45:12.537Z
Space Weather Message Code: ALTK05Serial Number: 1970Issue Time: 2026 Feb 23 0445 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Feb 23 0437 UTCSynoptic Period: 0300-0600 UTCActive Warning: YesNOAA Scale: G1 - MinorNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.