Local 11/6/2025, 8:31:37 PM
UTC 2025-11-06T20:31:37.250Z
Space Weather Message Code: WATA50Serial Number: 91Issue Time: 2025 Nov 06 2031 UTCWATCH: Geomagnetic Storm Category G3 PredictedHighest Storm Level Predicted by Day:Nov 07: G3 (Strong) Nov 08: G2 (Moderate) Nov 09: None (Below G1)THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECTNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 11/6/2025, 5:37:53 PM
UTC 2025-11-06T17:37:53.377Z
Space Weather Message Code: WARK04Serial Number: 5141Issue Time: 2025 Nov 06 1737 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5140Valid From: 2025 Nov 05 0137 UTCNow Valid Until: 2025 Nov 07 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 11/6/2025, 8:10:07 AM
UTC 2025-11-06T08:10:07.427Z
Space Weather Message Code: ALTK06Serial Number: 667Issue Time: 2025 Nov 06 0810 UTCALERT: Geomagnetic K-index of 6Threshold Reached: 2025 Nov 06 0809 UTCSynoptic Period: 0600-0900 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 11/6/2025, 6:37:16 AM
UTC 2025-11-06T06:37:16.337Z
Space Weather Message Code: ALTK05Serial Number: 1895Issue Time: 2025 Nov 06 0637 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2025 Nov 06 0636 UTCSynoptic Period: 0600-0900 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 11/6/2025, 5:36:37 AM
UTC 2025-11-06T05:36:37.503Z
Space Weather Message Code: ALTK07Serial Number: 193Issue Time: 2025 Nov 06 0536 UTCALERT: Geomagnetic K-index of 7Threshold Reached: 2025 Nov 06 0527 UTCSynoptic Period: 0300-0600 UTCActive Warning: YesNOAA Scale: G3 - StrongNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 11/6/2025, 4:10:15 AM
UTC 2025-11-06T04:10:15.970Z
Space Weather Message Code: WARK06Serial Number: 618Issue Time: 2025 Nov 06 0410 UTCEXTENDED WARNING: Geomagnetic K-Index of 6 expectedExtension to Serial Number: 617Valid From: 2025 Nov 05 2200 UTCNow Valid Until: 2025 Nov 06 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 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 11/6/2025, 4:08:58 AM
UTC 2025-11-06T04:08:58.853Z
Space Weather Message Code: WARK07Serial Number: 135Issue Time: 2025 Nov 06 0408 UTCWARNING: Geomagnetic K-index of 7 or greater expectedValid From: 2025 Nov 06 0408 UTCValid To: 2025 Nov 06 1200 UTCWarning Condition: OnsetNOAA Scale: G3 or greaterNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 11/6/2025, 3:51:26 AM
UTC 2025-11-06T03:51:26.497Z
Space Weather Message Code: ALTK06Serial Number: 666Issue Time: 2025 Nov 06 0351 UTCALERT: Geomagnetic K-index of 6Threshold Reached: 2025 Nov 06 0346 UTCSynoptic Period: 0300-0600 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 11/6/2025, 3:36:27 AM
UTC 2025-11-06T03:36:27.607Z
Space Weather Message Code: ALTK05Serial Number: 1894Issue Time: 2025 Nov 06 0336 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2025 Nov 06 0330 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.
Local 11/6/2025, 1:47:24 AM
UTC 2025-11-06T01:47:24.290Z
Space Weather Message Code: WARK05Serial Number: 2131Issue Time: 2025 Nov 06 0147 UTCEXTENDED WARNING: Geomagnetic K-index of 5 expectedExtension to Serial Number: 2130Valid From: 2025 Nov 05 1950 UTCNow Valid Until: 2025 Nov 06 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 11/6/2025, 1:46:51 AM
UTC 2025-11-06T01:46:51.323Z
Space Weather Message Code: WARK04Serial Number: 5140Issue Time: 2025 Nov 06 0146 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5139Valid From: 2025 Nov 05 0137 UTCNow Valid Until: 2025 Nov 06 1800 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 11/6/2025, 1:24:46 AM
UTC 2025-11-06T01:24:46.097Z
Space Weather Message Code: ALTK05Serial Number: 1893Issue Time: 2025 Nov 06 0124 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2025 Nov 06 0121 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 11/5/2025, 10:53:59 PM
UTC 2025-11-05T22:53:59.923Z
Space Weather Message Code: ALTK06Serial Number: 665Issue Time: 2025 Nov 05 2253 UTCALERT: Geomagnetic K-index of 6Threshold Reached: 2025 Nov 05 2252 UTCSynoptic Period: 2100-2400 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 11/5/2025, 10:37:35 PM
UTC 2025-11-05T22:37:35.353Z
Space Weather Message Code: WARK04Serial Number: 5139Issue Time: 2025 Nov 05 2237 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5138Valid From: 2025 Nov 05 0137 UTCNow Valid Until: 2025 Nov 07 0000 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 11/5/2025, 10:29:37 PM
UTC 2025-11-05T22:29:37.613Z
Space Weather Message Code: WARK06Serial Number: 617Issue Time: 2025 Nov 05 2229 UTCWARNING: Geomagnetic K-Index of 6 expectedValid From: 2025 Nov 05 2200 UTCValid To: 2025 Nov 06 0900 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 11/5/2025, 10:24:12 PM
UTC 2025-11-05T22:24:12.227Z
Space Weather Message Code: SUMXM5Serial Number: 298Issue Time: 2025 Nov 05 2224 UTCSUMMARY: X-ray Event exceeded M5Begin Time: 2025 Nov 05 2152 UTCMaximum Time: 2025 Nov 05 2207 UTCEnd Time: 2025 Nov 05 2216 UTCX-ray Class: M8.6Location: N24E45NOAA Scale: R2 - ModerateNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.
Local 11/5/2025, 10:21:27 PM
UTC 2025-11-05T22:21:27.913Z
Space Weather Message Code: ALTK05Serial Number: 1892Issue Time: 2025 Nov 05 2221 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2025 Nov 05 2214 UTCSynoptic Period: 2100-2400 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 11/5/2025, 10:21:01 PM
UTC 2025-11-05T22:21:01.753Z
Space Weather Message Code: SUM10RSerial Number: 884Issue Time: 2025 Nov 05 2221 UTCSUMMARY: 10cm Radio BurstBegin Time: 2025 Nov 05 2201 UTCMaximum Time: 2025 Nov 05 2201 UTCEnd Time: 2025 Nov 05 2206 UTCDuration: 5 minutesPeak Flux: 180 sfuLatest Penticton Noon Flux: 147 sfuDescription: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.
Local 11/5/2025, 10:16:16 PM
UTC 2025-11-05T22:16:16.433Z
Space Weather Message Code: ALTTP2Serial Number: 1438Issue Time: 2025 Nov 05 2216 UTCALERT: Type II Radio EmissionBegin Time: 2025 Nov 05 2159 UTCEstimated Velocity: 1395 km/sDescription: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.
Local 11/5/2025, 10:05:35 PM
UTC 2025-11-05T22:05:35.800Z
Space Weather Message Code: ALTXMFSerial Number: 496Issue Time: 2025 Nov 05 2205 UTCALERT: X-Ray Flux exceeded M5Threshold Reached: 2025 Nov 05 1103 UTCNOAA Scale: R2 - ModerateNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.
Local 11/5/2025, 8:16:19 PM
UTC 2025-11-05T20:16:19.587Z
Space Weather Message Code: ALTK05Serial Number: 1891Issue Time: 2025 Nov 05 2016 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2025 Nov 05 2010 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 11/5/2025, 7:50:20 PM
UTC 2025-11-05T19:50:20.773Z
Space Weather Message Code: WARK05Serial Number: 2130Issue Time: 2025 Nov 05 1950 UTCWARNING: Geomagnetic K-index of 5 expectedValid From: 2025 Nov 05 1950 UTCValid To: 2025 Nov 06 0900 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 11/5/2025, 7:40:33 PM
UTC 2025-11-05T19:40:33.500Z
Space Weather Message Code: ALTK04Serial Number: 2605Issue Time: 2025 Nov 05 1940 UTCALERT: Geomagnetic K-index of 4Threshold Reached: 2025 Nov 05 1936 UTCSynoptic Period: 1800-2100 UTCActive Warning: YesNOAA 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 11/5/2025, 6:07:19 PM
UTC 2025-11-05T18:07:19.157Z
Space Weather Message Code: WATA50Serial Number: 90Issue Time: 2025 Nov 05 1807 UTCWATCH: Geomagnetic Storm Category G3 PredictedHighest Storm Level Predicted by Day:Nov 06: G3 (Strong) Nov 07: G3 (Strong) Nov 08: G1 (Minor)THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECTNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 11/5/2025, 5:56:43 PM
UTC 2025-11-05T17:56:43.763Z
Space Weather Message Code: WARK04Serial Number: 5138Issue Time: 2025 Nov 05 1756 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5137Valid From: 2025 Nov 05 0137 UTCNow Valid Until: 2025 Nov 06 0000 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 11/5/2025, 2:53:21 PM
UTC 2025-11-05T14:53:21.900Z
Space Weather Message Code: ALTEF3Serial Number: 3556Issue Time: 2025 Nov 05 1453 UTCALERT: Electron 2MeV Integral Flux exceeded 1000pfuThreshold Reached: 2025 Nov 05 1445 UTCStation: GOES19Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 11/5/2025, 12:01:40 PM
UTC 2025-11-05T12:01:40.220Z
Space Weather Message Code: SUM10RSerial Number: 883Issue Time: 2025 Nov 05 1201 UTCSUMMARY: 10cm Radio BurstBegin Time: 2025 Nov 05 1047 UTCMaximum Time: 2025 Nov 05 1057 UTCEnd Time: 2025 Nov 05 1132 UTCDuration: 45 minutesPeak Flux: 760 sfuLatest Penticton Noon Flux: 159 sfuDescription: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.
Local 11/5/2025, 11:49:07 AM
UTC 2025-11-05T11:49:07.540Z
Space Weather Message Code: SUMXM5Serial Number: 297Issue Time: 2025 Nov 05 1149 UTCSUMMARY: X-ray Event exceeded M5Begin Time: 2025 Nov 05 1036 UTCMaximum Time: 2025 Nov 05 1119 UTCEnd Time: 2025 Nov 05 1143 UTCX-ray Class: M7.4Location: N22E48NOAA Scale: R2 - ModerateNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.
Local 11/5/2025, 11:09:18 AM
UTC 2025-11-05T11:09:18.187Z
Space Weather Message Code: ALTXMFSerial Number: 495Issue Time: 2025 Nov 05 1109 UTCALERT: X-Ray Flux exceeded M5Threshold Reached: 2025 Nov 05 1106 UTCNOAA Scale: R2 - ModerateNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.
Local 11/5/2025, 8:54:54 AM
UTC 2025-11-05T08:54:54.950Z
Space Weather Message Code: WARK04Serial Number: 5137Issue Time: 2025 Nov 05 0854 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5136Valid From: 2025 Nov 05 0137 UTCNow Valid Until: 2025 Nov 05 1800 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 11/5/2025, 1:42:30 AM
UTC 2025-11-05T01:42:30.983Z
Space Weather Message Code: ALTK04Serial Number: 2604Issue Time: 2025 Nov 05 0142 UTCALERT: Geomagnetic K-index of 4Threshold Reached: 2025 Nov 05 0133 UTCSynoptic Period: 0000-0300 UTCActive Warning: YesNOAA 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 11/5/2025, 1:37:06 AM
UTC 2025-11-05T01:37:06.277Z
Space Weather Message Code: WARK04Serial Number: 5136Issue Time: 2025 Nov 05 0137 UTCWARNING: Geomagnetic K-index of 4 expectedValid From: 2025 Nov 05 0137 UTCValid To: 2025 Nov 05 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 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 11/4/2025, 10:31:48 PM
UTC 2025-11-04T22:31:48.450Z
Space Weather Message Code: ALTTP4Serial Number: 690Issue Time: 2025 Nov 04 2231 UTCALERT: Type IV Radio EmissionBegin Time: 2025 Nov 04 1729 UTCDescription: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.
Local 11/4/2025, 10:21:59 PM
UTC 2025-11-04T22:21:59.163Z
Space Weather Message Code: SUMX01Serial Number: 198Issue Time: 2025 Nov 04 2221 UTCSUMMARY: X-ray Event exceeded X1Begin Time: 2025 Nov 04 2145 UTCMaximum Time: 2025 Nov 04 2201 UTCEnd Time: 2025 Nov 04 2211 UTCX-ray Class: X1.1Optical Class: naLocation: S13E72NOAA Scale: R3 - StrongNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.
Local 11/4/2025, 10:00:24 PM
UTC 2025-11-04T22:00:24.047Z
Space Weather Message Code: ALTXMFSerial Number: 494Issue Time: 2025 Nov 04 2200 UTCALERT: X-Ray Flux exceeded M5Threshold Reached: 2025 Nov 04 2157 UTCNOAA Scale: R2 - ModerateNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.
Local 11/4/2025, 9:40:41 PM
UTC 2025-11-04T21:40:41.293Z
Space Weather Message Code: WATA20Serial Number: 1075Issue Time: 2025 Nov 04 2140 UTCWATCH: Geomagnetic Storm Category G1 PredictedHighest Storm Level Predicted by Day:Nov 05: None (Below G1) Nov 06: G1 (Minor) Nov 07: G1 (Minor)THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECTNOAA 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.