Local 9/17/2025, 2:55:56 PM
UTC 2025-09-17T14:55:56.010Z
Space Weather Message Code: WARK04Serial Number: 5083Issue Time: 2025 Sep 17 1455 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5082Valid From: 2025 Sep 14 2015 UTCNow Valid Until: 2025 Sep 14 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 9/17/2025, 4:59:33 AM
UTC 2025-09-17T04:59:33.880Z
Space Weather Message Code: ALTEF3Serial Number: 3526Issue Time: 2025 Sep 17 0459 UTCCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfuContinuation of Serial Number: 3525Begin Time: 2025 Sep 16 1100 UTCYesterday Maximum 2MeV Flux: 3347 pfuPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 9/16/2025, 8:40:43 PM
UTC 2025-09-16T20:40:43.920Z
Space Weather Message Code: WARK04Serial Number: 5082Issue Time: 2025 Sep 16 2040 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5081Valid From: 2025 Sep 14 2015 UTCNow Valid Until: 2025 Sep 17 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 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 9/16/2025, 11:55:00 AM
UTC 2025-09-16T11:55:00.780Z
Space Weather Message Code: WARK04Serial Number: 5081Issue Time: 2025 Sep 16 1155 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5080Valid From: 2025 Sep 14 2015 UTCNow Valid Until: 2025 Sep 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 9/16/2025, 11:20:01 AM
UTC 2025-09-16T11:20:01.957Z
Space Weather Message Code: ALTEF3Serial Number: 3525Issue Time: 2025 Sep 16 1120 UTCALERT: Electron 2MeV Integral Flux exceeded 1000pfuThreshold Reached: 2025 Sep 16 1100 UTCStation: GOES19Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 9/16/2025, 2:39:56 AM
UTC 2025-09-16T02:39:56.387Z
Space Weather Message Code: ALTK05Serial Number: 1853Issue Time: 2025 Sep 16 0239 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2025 Sep 16 0235 UTCSynoptic Period: 0000-0300 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 9/15/2025, 10:41:24 PM
UTC 2025-09-15T22:41:24.737Z
Space Weather Message Code: WARK04Serial Number: 5080Issue Time: 2025 Sep 15 2241 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5079Valid From: 2025 Sep 14 2015 UTCNow Valid Until: 2025 Sep 16 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 9/15/2025, 10:05:34 PM
UTC 2025-09-15T22:05:34.097Z
Space Weather Message Code: WARK05Serial Number: 2102Issue Time: 2025 Sep 15 2205 UTCEXTENDED WARNING: Geomagnetic K-index of 5 expectedExtension to Serial Number: 2101Valid From: 2025 Sep 14 2330 UTCNow Valid Until: 2025 Sep 16 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 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.