:Product: 0821SGAS.txt
:Issued: 2026 Aug 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 233 Issued at 0245Z on 21 Aug 2026
This report is compiled from data received at SWO on 20 Aug
A.  Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
 0731 0805 0817  4513 N04E73 M1.8  Sf                               
 1132 1142 1154  4513 N06E79 M8.1  Sf 110           II              
 1552 1611 1621  4513 N03E71 M2.9  1f 100                           
 1848      1853                                     II              
 2321 2322 2322                       260                           
 2334 2344 2347              C3.5     110                           
 2348 2351 2352                       170                           
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 125  SSN 072  Afr/Ap 011/011   X-ray Background C1.1
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 1.7e+05   GT 10 MeV 2.1e+04 p/(cm2-ster-day)
(GOES-18 satellite synchronous orbit W137 degrees)
Daily Electron Fluence
GT 2 MeV 3.40e+07 e/(cm2-ster-day)
(GOES-19 satellite synchronous orbit W72 degrees)
3 Hour K-indices:
Boulder 2 2 3 1 3 3 3 3 Planetary 3 2 2 2 3 2 3 3 
F.  Comments:  None