Local 3/17/2026, 2:03:49 PM
UTC 2026-03-17T14:03:49.470Z
Space Weather Message Code: ALTEF3Serial Number: 3649Issue Time: 2026 Mar 17 1403 UTCCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfuContinuation of Serial Number: 3648Begin Time: 2026 Mar 15 1630 UTCYesterday Maximum 2MeV Flux: 2213 pfuPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 3/16/2026, 9:08:59 PM
UTC 2026-03-16T21:08:59.560Z
Space Weather Message Code: WATA30Serial Number: 264Issue Time: 2026 Mar 16 2108 UTCWATCH: Geomagnetic Storm Category G2 PredictedHighest Storm Level Predicted by Day:Mar 17: None (Below G1) Mar 18: None (Below G1) Mar 19: G2 (Moderate)THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECTComment: G2 (Moderate) geomagnetic storming is likely on 19 Mar with the arrival of a CME that left the Sun on 16 Mar. This is a reissue of the previous watch to correct an internal system error.NOAA 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 3/16/2026, 8:25:18 PM
UTC 2026-03-16T20:25:18.200Z
Space Weather Message Code: WATA30Serial Number: 264Issue Time: 2026 Mar 16 2025 UTCWATCH: Geomagnetic Storm Category G2 PredictedHighest Storm Level Predicted by Day:Mar 17: None (Below G1) Mar 18: None (Below G1) Mar 19: G2 (Moderate)THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECTComment: G2 (Moderate) geomagnetic storming is likely on 19 Mar with the arrival of the 16 Mar CME event. This event was associated with an M2.7 flare from AR 4392.NOAA 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 3/16/2026, 1:20:36 PM
UTC 2026-03-16T13:20:36.937Z
Space Weather Message Code: ALTEF3Serial Number: 3648Issue Time: 2026 Mar 16 1320 UTCCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfuContinuation of Serial Number: 3647Begin Time: 2026 Mar 15 1630 UTCYesterday Maximum 2MeV Flux: 1429 pfuPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 3/16/2026, 12:29:37 PM
UTC 2026-03-16T12:29:37.860Z
Space Weather Message Code: SUM10RSerial Number: 901Issue Time: 2026 Mar 16 1229 UTCSUMMARY: 10cm Radio BurstBegin Time: 2026 Mar 16 1209 UTCMaximum Time: 2026 Mar 16 1213 UTCEnd Time: 2026 Mar 16 1217 UTCDuration: 8 minutesPeak Flux: 380 sfuLatest Penticton Noon Flux: 109 sfuComment: Associated with M2.7 flare from AR 4392.Description: 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 3/16/2026, 12:26:18 PM
UTC 2026-03-16T12:26:18.087Z
Space Weather Message Code: ALTTP4Serial Number: 705Issue Time: 2026 Mar 16 1226 UTCALERT: Type IV Radio EmissionBegin Time: 2026 Mar 16 1212 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 3/16/2026, 12:24:57 PM
UTC 2026-03-16T12:24:57.823Z
Space Weather Message Code: ALTTP2Serial Number: 1469Issue Time: 2026 Mar 16 1224 UTCALERT: Type II Radio EmissionBegin Time: 2026 Mar 16 1209 UTCEstimated Velocity: 1227 km/sComment: Likely associated with M2.7 flare from AR 4392.Description: 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 3/15/2026, 11:15:54 PM
UTC 2026-03-15T23:15:54.907Z
Space Weather Message Code: ALTK04Serial Number: 2644Issue Time: 2026 Mar 15 2315 UTCALERT: Geomagnetic K-index of 4Threshold Reached: 2026 Mar 15 2310 UTCSynoptic Period: 2100-2400 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 3/15/2026, 11:15:10 PM
UTC 2026-03-15T23:15:10.933Z
Space Weather Message Code: ALTK04Serial Number: 2643Issue Time: 2026 Mar 15 2315 UTCCANCEL ALERT: Geomagnetic K-index of 4Cancel Serial Number: 2642Original Issue Time: 2026 Mar 15 2314 UTCComment: Incorrectly entered start time.NOAA 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 3/15/2026, 11:14:06 PM
UTC 2026-03-15T23:14:06.087Z
Space Weather Message Code: ALTK04Serial Number: 2642Issue Time: 2026 Mar 15 2314 UTCALERT: Geomagnetic K-index of 4Threshold Reached: 2026 Mar 15 2300 UTCSynoptic Period: 2100-2400 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 3/15/2026, 11:10:08 PM
UTC 2026-03-15T23:10:08.973Z
Space Weather Message Code: WARK04Serial Number: 5288Issue Time: 2026 Mar 15 2310 UTCWARNING: Geomagnetic K-index of 4 expectedValid From: 2026 Mar 15 2309 UTCValid To: 2026 Mar 16 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 3/15/2026, 4:45:09 PM
UTC 2026-03-15T16:45:09.667Z
Space Weather Message Code: ALTEF3Serial Number: 3647Issue Time: 2026 Mar 15 1645 UTCALERT: Electron 2MeV Integral Flux exceeded 1000pfuThreshold Reached: 2026 Mar 15 1630 UTCStation: GOES19Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.