Local 10/21/2025, 9:09:33 PM
UTC 2025-10-21T21:09:33.833Z
Space Weather Message Code: ALTTP4Serial Number: 687Issue Time: 2025 Oct 21 2109 UTCALERT: Type IV Radio EmissionBegin Time: 2025 Oct 21 2011 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 10/21/2025, 9:08:17 PM
UTC 2025-10-21T21:08:17.517Z
Space Weather Message Code: ALTTP2Serial Number: 1434Issue Time: 2025 Oct 21 2108 UTCALERT: Type II Radio EmissionBegin Time: 2025 Oct 21 2007 UTCEstimated Velocity: 2474 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 10/21/2025, 9:09:36 AM
UTC 2025-10-21T09:09:36.160Z
Space Weather Message Code: WARK04Serial Number: 5117Issue Time: 2025 Oct 21 0909 UTCCANCEL WARNING: Geomagnetic K-index of 4 expectedCancel Serial Number: 5116Original Issue Time: 2025 Oct 21 0456 UTCComment: The conditions for this warning no longer existNOAA 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 10/21/2025, 4:56:03 AM
UTC 2025-10-21T04:56:03.260Z
Space Weather Message Code: WARK04Serial Number: 5116Issue Time: 2025 Oct 21 0456 UTCWARNING: Geomagnetic K-index of 4 expectedValid From: 2025 Oct 21 0455 UTCValid To: 2025 Oct 21 1500 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.