:Product: 0529SGAS.txt :Issued: 2021 May 29 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 149 Issued at 0245Z on 29 May 2021 This report is compiled from data received at SWO on 28 May A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 2219 2313 0012 2824 N21W63 C9.4 1f II/IV B. Proton Events: The greater than 10 MeV proton flux is expected to reach 10 pfu threshold on 29 May due to the long duration C9 flare at 28/2313 UTC. C. Geomagnetic Activity Summary: The geomagnetic field was quiet. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 077 SSN 028 Afr/Ap 003/003 X-ray Background B1.3 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 5.4e+04 GT 10 MeV 4.5e+04 p/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 1.70e+06 e/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 1 1 0 1 2 2 1 1 Planetary 1 1 0 0 1 1 1 1 F. Comments: None.