:Product: 0819SGAS.txt :Issued: 2021 Aug 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 231 Issued at 0245Z on 19 Aug 2021 This report is compiled from data received at SWO on 18 Aug A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep None B. Proton Events: None C. Geomagnetic Activity Summary: Levels were mostly quiet with one unsettled period observed during the first half of the day. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 075 SSN 016 Afr/Ap 006/006 X-ray Background A3.7 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 5.5e+04 GT 10 MeV 4.6e+04 p/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 1.60e+07 e/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 2 2 1 0 2 1 2 1 Planetary 2 3 0 1 2 1 1 1 F. Comments: None