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356 WOXX32 KWNP 110250 ALTPX1 Space Weather Message Code: ALTPX1 Serial Number: 309 Issue Time: 2014 Sep 11 0247 UTC ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu Begin Time: 2014 Sep 11 0240 UTC NOAA Scale: S1 - Minor Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. # 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