:Product: 0420SGAS.txt :Issued: 2017 Apr 20 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 110 Issued at 0245Z on 20 Apr 2017 This report is compiled from data received at SWO on 19 Apr A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep None B. Proton Events: None. C. Geomagnetic Activity Summary: The geomagnetic field reached minor storm levels during the 19/03-06 UTC synoptic period due to brief elevated CH HSS influences. Activity returned to quiet/unsettled conditions for the remainder of the period. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 081 SSN 014 Afr/Ap 012/017 X-ray Background B1.3 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 2.0e+07 GT 10 MeV 1.5e+04 p/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 1.70e+06 e/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 3 5 4 2 1 3 3 2 Planetary 3 5 3 2 1 2 3 2 F. Comments: None