:Product: 0421SGAS.txt :Issued: 2024 Apr 21 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 112 Issued at 0245Z on 21 Apr 2024 This report is compiled from data received at SWO on 20 Apr A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0057 0107 0113 3638 S17W08 C4.8 Sn 560 1450 1450 1451 600 1537 1541 1547 3645 S07W19 Sf 470 1635 1641 1646 3645 S07W19 C4.9 Sf 470 1807 1807 1807 240 2046 2056 2105 3638 S18W25 C3.2 Sf 200 B. Proton Events: None. C. Geomagnetic Activity Summary: The geomagnetic field reached active levels. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 210 SSN 240 Afr/Ap 010/012 X-ray Background C1.7 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.9e+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+06 e/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 3 2 3 4 3 3 1 2 Planetary 2 1 3 4 2 3 3 3 F. Comments: None.