:Product: 0518SGAS.txt
:Issued: 2025 May 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 138 Issued at 0245Z on 18 May 2025
This report is compiled from data received at SWO on 17 May
A.  Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
 0956 1009 1019  4089        B8.5     170                           
B.  Proton Events:  None.
C.  Geomagnetic Activity Summary:  The geomagnetic field reached
major storm levels during the onset of a postive polarity coronal
hole with possible embedded transient.
D.  Stratwarm:  Not Available
E.  Daily Indices: (real-time preliminary/estimated values)
10 cm 117  SSN 058  Afr/Ap 025/???   X-ray Background B4.0
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 1.2e+06   GT 10 MeV 1.5e+04 p/(cm2-ster-day)
(GOES-18 satellite synchronous orbit W137 degrees)
Daily Electron Fluence
GT 2 MeV 1.10e+07 e/(cm2-ster-day)
(GOES-19 satellite synchronous orbit W75 degrees)
3 Hour K-indices:
Boulder 5 5 4 5 5 5 3 2 Planetary 6 5 3 5 4 4 4 3 
F.  Comments:  None.
