:Product: Solar and Geophysical Activity Summary
:Issued: 2026 Aug 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 228 Issued at 0245Z on 16 Aug 2026
This report is compiled from data received at SWO on 15 Aug
A.  Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
 0655 0700 0705  4507        B6.5     3100                          
 0758 0758 0758                       110                           
 0806 0806 0806                       120                           
 1302 1302 1302                       120                           
 1330 1339 1341  4507 N03W13 C2.0  Sf 200                           
 1432 1432 1432                       220                           
 1438 1449 1458  4507 N07W14 C3.2  Sn 280                           
 1613 1614 1614                       110                           
 1629 1629 1630                       140                           
 1644 1646 1646                       150                           
 1739 1739 1739                       110                           
 1926 1926 1928                       160                           
B.  Proton Events:  None.
C.  Geomagnetic Activity Summary:  The geomagnetic field was quiet
and unsettled.
D.  Stratwarm:  Not Available
E.  Daily Indices: (real-time preliminary/estimated values)
10 cm 117  SSN 111  Afr/Ap 006/???   X-ray Background B4.5
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 8.0e+04   GT 10 MeV 2.0e+04 p/(cm2-ster-day)
(GOES-18 satellite synchronous orbit W137 degrees)
Daily Electron Fluence
GT 2 MeV 1.50e+07 e/(cm2-ster-day)
(GOES-19 satellite synchronous orbit W72 degrees)
3 Hour K-indices:
Boulder 1 1 0 2 2 2 2 1 Planetary 1 2 0 1 2 2 3 ? 
F.  Comments:  None.