:Product: 0516SGAS.txt :Issued: 2025 May 16 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 136 Issued at 0245Z on 16 May 2025 This report is compiled from data received at SWO on 15 May A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0110 0110 0111 100 0539 0539 0539 160 1151 1151 1151 100 1542 1543 1543 500 1708 1721 1727 4087 N18E48 M2.1 1f 2211 2219 2221 4087 N16E42 C9.6 Sf 170 2333 2333 2333 110 B. Proton Events: None. C. Geomagnetic Activity Summary: The geomagnetic field was quiet to active. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 119 SSN 045 Afr/Ap 015/013 X-ray Background B5.0 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 4.9e+05 GT 10 MeV 1.6e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 1.50e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 3 5 3 3 2 2 2 3 Planetary 3 4 3 2 2 3 2 3 F. Comments: None.