WOXX10 KWNP 202111 SUMSUD Space Weather Message Code: SUMSUD Serial Number: 296 Issue Time: 2026 Mar 20 2109 UTC SUMMARY: Geomagnetic Sudden Impulse Observed: 2026 Mar 20 2053 UTC Deviation: 56 nT Station: BOU www.swpc.noaa.gov/noaa-scales-explanation # Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Recent messages, data, and help at http://swpc.noaa.gov/alerts/ # Send questions to SWPC.Webmaster@noaa.gov