:Product: 1018SGAS.txt :Issued: 2025 Oct 18 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 291 Issued at 0245Z on 18 Oct 2025 This report is compiled from data received at SWO on 17 Oct A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0115 0128 0140 4246 N24W66 M1.5 1f 1145 1145 1145 120 1227 1245 1301 4246 M1.1 1422 1432 1436 4246 N22W75 M1.0 Sf 1614 1632 1647 4246 M1.3 130 1647 1658 1708 4246 M1.2 1855 1855 1855 310 1855 1905 1912 4246 N22W78 M1.1 Sf 2043 2043 2043 250 2251 2251 2251 410 B. Proton Events: None. C. Geomagnetic Activity Summary: The geomagnetic field was quiet to unsettled. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 164 SSN 120 Afr/Ap 008/009 X-ray Background C3.0 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.2e+06 GT 10 MeV 1.6e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 6.80e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 2 2 2 4 3 4 1 2 Planetary 2 2 3 3 2 3 1 2 F. Comments: None.