:Product: 0516SGAS.txt :Issued: 2026 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 2026 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 0720 0720 0720 260 0838 0840 0841 4435 N24W72 Sf 110 0932 0936 0939 B9.4 590 1143 1150 1154 4435 N23W74 C4.3 Sf 160 II 1310 1313 1317 4435 N24W75 C6.7 Sf 3200 II 1605 1614 1618 4435 N23W76 C9.5 Sf 390 II 1732 1740 1745 4435 B8.2 110 B. Proton Events: None C. Geomagnetic Activity Summary: Field conditions were at quiet to moderate (G2) levels. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 101 SSN 046 Afr/Ap 022/035 X-ray Background B3.9 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 3.3e+06 GT 10 MeV 1.8e+04 p/(cm2-ster-day) (GOES-19 satellite synchronous orbit W72 degrees) Daily Electron Fluence GT 2 MeV 1.20e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W72 degrees) 3 Hour K-indices: Boulder 1 2 3 3 5 5 4 5 Planetary 2 2 3 3 5 5 4 6 F. Comments: None