:Product: 0526SGAS.txt :Issued: 2026 May 26 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 146 Issued at 0245Z on 26 May 2026 This report is compiled from data received at SWO on 25 May A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0309 0309 0309 100 0641 0653 0707 4447 S16E21 C1.7 Sf 100 0825 0825 0825 190 0859 0859 0859 680 0902 0902 0904 160 0913 0913 0913 120 0920 0920 0920 110 1150 1150 1150 160 1326 1326 1326 100 1857 1857 1858 120 1903 1903 1903 170 B. Proton Events: The greater than 10 MeV flux reached threshold level at 26/0010Z. C. Geomagnetic Activity Summary: The geomagnetic field reached unsettled levels D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 139 SSN 132 Afr/Ap 008/008 X-ray Background B9.4 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.3e+06 GT 10 MeV 3.5e+04 p/(cm2-ster-day) (GOES-19 satellite synchronous orbit W72 degrees) Daily Electron Fluence GT 2 MeV 1.40e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W72 degrees) 3 Hour K-indices: Boulder 3 3 1 2 3 3 2 2 Planetary 3 2 2 2 2 2 2 3 F. Comments: None