S1 (Minor) Radiation Storm 28 October, 2021
published: Monday, November 1, 2021 00:17 UTC UTC
An S1 (Minor) radiation storm began on 28 October, 2021, at 1740 UTC (1:40 pm EDT). A Radiation Storm warning is in effect until 29 Oct at 1200 UTC (8:40 am EDT). The S1 event is in association with the X1 flare that occurred at 1535 UTC on 28 October - see related story. You can learn more about radiation storms by visiting our phenomena page story on Solar Radiation Storms Please continue to visit our SWPC webpage for the latest information and updates.