:Product: 20020419SGAS.txt
:Issued: 2002 Apr 19 0245 UTC
# Prepared jointly by the U.S. Dept. of Commerce, NOAA,
# Space Environment Center and the U.S. Air Force.
#
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 109 Issued at 0245Z on 19 Apr 2002
This report is compiled from data received at SWO on 18 Apr
A.  Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0145 0145 0145                       160
0527 0530 0533              C1.8     200
1430 1433 1435  9907 S04W16 C1.5  Sf 120
1734 1734 1734                       150
B.  Proton Events:  Yesterday's greater than 10 MeV proton event has
ended: start 17/1530 UTC, maximum flux (24 pfu) 17/1540 UTC, and end
18/0035 UTC.
C.  Geomagnetic Activity Summary:  The geomagnetic field ranged from
quiet to severe storm levels in response to the CME that impacted
the Earth early on 17 April. ACE solar wind information suggests
that this CME has passed.
D.  Stratwarm:  None
E.  Daily Indices: (real-time preliminary/estimated values)
10 cm 188  SSN 160  Afr/Ap 045/054   X-ray Background C1.3
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 4.4e+07   GT 10 MeV 3.1e+05 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 4.40e+06 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices:
Boulder 5 7 5 5 4 4 2 3 Planetary 6 7 6 5 4 4 4 3
F.  Comments:  The 18 April Afr reported in Part E is estimated from
Boulder observations.