:Product: 0527SGAS.txt :Issued: 2026 May 27 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 147 Issued at 0245Z on 27 May 2026 This report is compiled from data received at SWO on 26 May A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0208 0208 0208 370 0407 0407 0407 130 0433 0434 0434 300 0608 0608 0609 500 0700 0700 0700 140 0710 0710 0710 110 0711 0717 0723 4448 S08E52 C2.4 Sf 120 0754 0754 0754 100 1244 1250 II 1625 1625 1625 140 B. Proton Events: The greater than 10 MeV flux reached S1 levels. Max pfu was 23. C. Geomagnetic Activity Summary: The geoamagnetic field reached active levels. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 141 SSN 148 Afr/Ap 007/008 X-ray Background B9.6 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 2.6e+06 GT 10 MeV 4.2e+05 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 2 0 1 2 1 3 2 3 Planetary 2 1 1 1 1 1 2 4 F. Comments: None.