:Product: 0420SGAS.txt :Issued: 2026 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 2026 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 0032 0032 0032 340 0220 0220 0220 160 0223 0223 0223 100 0332 0332 0333 350 0620 0620 0620 150 0625 0625 0625 120 0636 0636 0637 270 0641 0641 0645 210 0733 0733 0736 1900 0943 0943 0943 120 1219 1219 1219 100 1231 1231 1231 110 1833 1833 1833 130 2030 2030 2031 290 B. Proton Events: None C. Geomagnetic Activity Summary: Geomagnetic activity reached Moderate storm levels. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 105 SSN 035 Afr/Ap 016/023 X-ray Background B3.1 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 6.4e+05 GT 10 MeV 1.7e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 4.10e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W72 degrees) 3 Hour K-indices: Boulder 3 5 5 3 2 2 1 2 Planetary 4 5 6 4 3 3 2 2 F. Comments: None