Local 2/17/2026, 1:18:38 PM
UTC 2026-02-17T13:18:38.287Z
Space Weather Message Code: ALTEF3Serial Number: 3628Issue Time: 2026 Feb 17 1318 UTCCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfuContinuation of Serial Number: 3627Begin Time: 2026 Feb 16 1635 UTCYesterday Maximum 2MeV Flux: 1518 pfuPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 2/16/2026, 8:52:06 PM
UTC 2026-02-16T20:52:06.583Z
Space Weather Message Code: WARK05Serial Number: 2195Issue Time: 2026 Feb 16 2052 UTCEXTENDED WARNING: Geomagnetic K-index of 5 expectedExtension to Serial Number: 2194Valid From: 2026 Feb 16 1700 UTCNow Valid Until: 2026 Feb 17 0900 UTCWarning Condition: OnsetNOAA 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 2/16/2026, 8:52:06 PM
UTC 2026-02-16T20:52:06.570Z
Space Weather Message Code: WARK06Serial Number: 641Issue Time: 2026 Feb 16 2052 UTCEXTENDED WARNING: Geomagnetic K-Index of 6 expectedExtension to Serial Number: 640Valid From: 2026 Feb 16 1840 UTCNow Valid Until: 2026 Feb 17 0300 UTCWarning Condition: OnsetNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 2/16/2026, 8:52:06 PM
UTC 2026-02-16T20:52:06.553Z
Space Weather Message Code: WARK04Serial Number: 5261Issue Time: 2026 Feb 16 2052 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5260Valid From: 2026 Feb 14 2000 UTCNow Valid Until: 2026 Feb 17 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 2/16/2026, 8:00:51 PM
UTC 2026-02-16T20:00:51.963Z
Space Weather Message Code: ALTK06Serial Number: 696Issue Time: 2026 Feb 16 2000 UTCALERT: Geomagnetic K-index of 6Threshold Reached: 2026 Feb 16 2000 UTCSynoptic Period: 1800-2100 UTCActive Warning: YesNOAA Scale: G2 - ModerateNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 2/16/2026, 6:39:04 PM
UTC 2026-02-16T18:39:04.367Z
Space Weather Message Code: WARK06Serial Number: 640Issue Time: 2026 Feb 16 1839 UTCWARNING: Geomagnetic K-Index of 6 expectedValid From: 2026 Feb 16 1840 UTCValid To: 2026 Feb 16 2100 UTCWarning Condition: OnsetNOAA Scale: G2 - ModerateNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 2/16/2026, 6:36:26 PM
UTC 2026-02-16T18:36:26.503Z
Space Weather Message Code: ALTK05Serial Number: 1966Issue Time: 2026 Feb 16 1836 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Feb 16 1836 UTCSynoptic Period: 1800-2100 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.
Local 2/16/2026, 5:01:41 PM
UTC 2026-02-16T17:01:41.677Z
Space Weather Message Code: WARK04Serial Number: 5260Issue Time: 2026 Feb 16 1701 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5259Valid From: 2026 Feb 14 2000 UTCNow Valid Until: 2026 Feb 17 0300 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 2/16/2026, 5:01:41 PM
UTC 2026-02-16T17:01:41.660Z
Space Weather Message Code: WARK05Serial Number: 2194Issue Time: 2026 Feb 16 1701 UTCWARNING: Geomagnetic K-index of 5 expectedValid From: 2026 Feb 16 1700 UTCValid To: 2026 Feb 16 2359 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 2/16/2026, 4:51:27 PM
UTC 2026-02-16T16:51:27.390Z
Space Weather Message Code: ALTEF3Serial Number: 3627Issue Time: 2026 Feb 16 1651 UTCALERT: Electron 2MeV Integral Flux exceeded 1000pfuThreshold Reached: 2026 Feb 16 1635 UTCStation: GOES19Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 2/16/2026, 5:57:00 AM
UTC 2026-02-16T05:57:00.170Z
Space Weather Message Code: WARK04Serial Number: 5259Issue Time: 2026 Feb 16 0557 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5258Valid From: 2026 Feb 14 2000 UTCNow Valid Until: 2026 Feb 16 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 2/16/2026, 5:56:27 AM
UTC 2026-02-16T05:56:27.313Z
Space Weather Message Code: WARK05Serial Number: 2193Issue Time: 2026 Feb 16 0556 UTCEXTENDED WARNING: Geomagnetic K-index of 5 expectedExtension to Serial Number: 2192Valid From: 2026 Feb 16 0140 UTCNow Valid Until: 2026 Feb 16 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 2/16/2026, 1:42:32 AM
UTC 2026-02-16T01:42:32.007Z
Space Weather Message Code: WARK05Serial Number: 2192Issue Time: 2026 Feb 16 0142 UTCWARNING: Geomagnetic K-index of 5 expectedValid From: 2026 Feb 16 0140 UTCValid To: 2026 Feb 16 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 2/15/2026, 11:38:11 PM
UTC 2026-02-15T23:38:11.260Z
Space Weather Message Code: WARK04Serial Number: 5258Issue Time: 2026 Feb 15 2338 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5257Valid From: 2026 Feb 14 2000 UTCNow Valid Until: 2026 Feb 16 0900 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.