Local 12/6/2025, 9:07:43 PM
UTC 2025-12-06T21:07:43.110Z
Space Weather Message Code: ALTTP4Serial Number: 698Issue Time: 2025 Dec 06 2107 UTCALERT: Type IV Radio EmissionBegin Time: 2025 Dec 06 2057 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 12/6/2025, 8:57:30 PM
UTC 2025-12-06T20:57:30.080Z
Space Weather Message Code: SUMXM5Serial Number: 301Issue Time: 2025 Dec 06 2057 UTCSUMMARY: X-ray Event exceeded M5Begin Time: 2025 Dec 06 2029 UTCMaximum Time: 2025 Dec 06 2039 UTCEnd Time: 2025 Dec 06 2049 UTCX-ray Class: M8.1Optical Class: 2bLocation: N20E01NOAA 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 12/6/2025, 8:54:09 PM
UTC 2025-12-06T20:54:09.173Z
Space Weather Message Code: SUM10RSerial Number: 892Issue Time: 2025 Dec 06 2054 UTCSUMMARY: 10cm Radio BurstBegin Time: 2025 Dec 06 2035 UTCMaximum Time: 2025 Dec 06 2036 UTCEnd Time: 2025 Dec 06 2039 UTCDuration: 4 minutesPeak Flux: 1100 sfuLatest Penticton Noon Flux: 200 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 12/6/2025, 8:51:38 PM
UTC 2025-12-06T20:51:38.973Z
Space Weather Message Code: ALTTP2Serial Number: 1451Issue Time: 2025 Dec 06 2051 UTCALERT: Type II Radio EmissionBegin Time: 2025 Dec 06 2040 UTCEstimated Velocity: 1143 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 12/6/2025, 8:41:32 PM
UTC 2025-12-06T20:41:32.950Z
Space Weather Message Code: ALTXMFSerial Number: 504Issue Time: 2025 Dec 06 2041 UTCALERT: X-Ray Flux exceeded M5Threshold Reached: 2025 Dec 06 2037 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 12/6/2025, 12:34:29 PM
UTC 2025-12-06T12:34:29.527Z
Space Weather Message Code: ALTEF3Serial Number: 3572Issue Time: 2025 Dec 06 1234 UTCCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfuContinuation of Serial Number: 3571Begin Time: 2025 Dec 05 1530 UTCYesterday Maximum 2MeV Flux: 1426 pfuPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 12/6/2025, 8:52:21 AM
UTC 2025-12-06T08:52:21.887Z
Space Weather Message Code: WARK04Serial Number: 5175Issue Time: 2025 Dec 06 0852 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5174Valid From: 2025 Dec 06 0205 UTCNow Valid Until: 2025 Dec 06 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 12/6/2025, 8:37:21 AM
UTC 2025-12-06T08:37:21.287Z
Space Weather Message Code: WARK05Serial Number: 2148Issue Time: 2025 Dec 06 0837 UTCWARNING: Geomagnetic K-index of 5 expectedValid From: 2025 Dec 06 0836 UTCValid To: 2025 Dec 06 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 12/6/2025, 2:58:26 AM
UTC 2025-12-06T02:58:26.857Z
Space Weather Message Code: ALTK04Serial Number: 2613Issue Time: 2025 Dec 06 0258 UTCALERT: Geomagnetic K-index of 4Threshold Reached: 2025 Dec 06 0256 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 12/6/2025, 2:06:29 AM
UTC 2025-12-06T02:06:29.027Z
Space Weather Message Code: WARK04Serial Number: 5174Issue Time: 2025 Dec 06 0206 UTCWARNING: Geomagnetic K-index of 4 expectedValid From: 2025 Dec 06 0205 UTCValid To: 2025 Dec 06 1200 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 12/5/2025, 7:22:12 PM
UTC 2025-12-05T19:22:12.843Z
Space Weather Message Code: WATA20Serial Number: 1080Issue Time: 2025 Dec 05 1922 UTCWATCH: Geomagnetic Storm Category G1 PredictedHighest Storm Level Predicted by Day:Dec 06: None (Below G1) Dec 07: G1 (Minor) Dec 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 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 12/5/2025, 3:45:20 PM
UTC 2025-12-05T15:45:20.160Z
Space Weather Message Code: ALTEF3Serial Number: 3571Issue Time: 2025 Dec 05 1545 UTCALERT: Electron 2MeV Integral Flux exceeded 1000pfuThreshold Reached: 2025 Dec 05 1530 UTCStation: GOES-19Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.