:Product: 0913SGAS.txt :Issued: 2017 Sep 13 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 256 Issued at 0245Z on 13 Sep 2017 This report is compiled from data received at SWO on 12 Sep A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0227 0227 0227 120 0233 0233 0233 110 0236 0236 0236 100 0305 0305 0305 110 0308 0308 0309 130 0312 0312 0312 110 0335 0335 0335 100 0722 0729 0734 2680 N08E48 C3.0 Sf 860 110 II 0742 0742 0748 2680 N07E48 Sf II 1528 1535 1539 2680 N11E44 B3.5 Sf 110 1903 1920 1928 2680 N10E41 C1.6 Sf 170 II 2357 2357 2359 280 B. Proton Events: The greater than 10 MeV proton flux reached a peak flux of 748 pfu at 12/0005 UTC. The greater than 100 MeV proton flux has gradually declined to near 2 pfu. C. Geomagnetic Activity Summary: The geomagnetic field was quiet to unsettled for most of the day. An increase to isolated active and minor storm conditions occurred the final two synoptic periods of the day, likely associated with the arrival of a CIR ahead of a positive polarity CH HSS. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 076 SSN 011 Afr/Ap 016/016 X-ray Background A8.3 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.9e+08 GT 10 MeV 2.8e+07 p/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 2.00e+08 e/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 3 1 4 4 4 3 3 4 Planetary 2 1 3 3 3 3 4 5 F. Comments: None