:Product: 0519SGAS.txt :Issued: 2021 May 19 0245 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Solar and Geophysical Activity Summary SGAS Number 139 Issued at 0245Z on 19 May 2021 This report is compiled from data received at SWO on 18 May A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0219 0226 II 1717 1717 1717 190 B. Proton Events: None C. Geomagnetic Activity Summary: The geomagnetic response was quiet to active conditions. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 076 SSN 024 Afr/Ap 010/016 X-ray Background A7.6 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 5.7e+04 GT 10 MeV 4.3e+04 p/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 1.70e+06 e/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 3 4 4 3 2 1 2 2 Planetary 3 4 3 2 1 1 0 1 F. Comments: None