:Product: 0418SGAS.txt
:Issued: 2021 Apr 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 108 Issued at 0245Z on 18 Apr 2021
This report is compiled from data received at SWO on 17 Apr
A.  Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
 1626      1635                                     II              
 1658 1700 1702                       180                           
B.  Proton Events:  None
C.  Geomagnetic Activity Summary:  Field activity was at unsettled to
G1 (Minor) storm levels due to negative polarity, CH HSS influence.
D.  Stratwarm:  Not Available
E.  Daily Indices: (real-time preliminary/estimated values)
10 cm 075  SSN 028  Afr/Ap 020/024   X-ray Background A4.4
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 2.5e+05   GT 10 MeV 4.2e+04 p/(cm2-ster-day)
(GOES-16 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 3.00e+07 e/(cm2-ster-day)
(GOES-16 satellite synchronous orbit W75 degrees)
3 Hour K-indices:
Boulder 4 4 5 3 4 4 3 3 Planetary 4 4 5 4 3 3 3 4 
F.  Comments:  None