:Product: 20031030SGAS.txt
:Issued: 2003 Oct 30 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 303 Issued at 0245Z on 30 Oct 2003
This report is compiled from data received at SWO on 29 Oct
A.  Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0026 0151 0208  0486 S16E10 M1.1  1f 5400   63
0137 0337 0412                       5800
0408 0511 0554  0486 S17E06 M3.5  Sn 6600   610       IV
1234 1234 1234                       1000
1348 0000 2354                                        IV
2037 2049 2101  0486 S15W02 X10.0 2b 360000 2500   II/IV
2305 2322 2353       S18W02       Sf 8200
B.  Proton Events:  The large proton event and GLE that followed the
X17 flare on 28 Oct was in decline for most of the period. The
greater than 10 MeV proton event that began on 28/1215Z, peaked at
29/0615Z at 29,500 pfu, making it the second largest, greater than
10 MeV proton event this cycle (second only to the 31,700 pfu proton
event in November 2001). The greater than 100 MeV proton event began
at 28/1145Z, and peaked at 29/0015Z at 186 pfu. The proton events
were still in progress when a new stream of protons began, following
the X10 flare at around 2100Z.
C.  Geomagnetic Activity Summary:  The geomagnetic field ranged from
unsettled to severe storming. The powerful CME from the X17/4b flare
on 28/1110Z, impacted the Earth's magnetic field at 29/0613Z. The
transit time for this CME was around 19 hours, making it one of the
fastest on record. The sudden impulse measured 140 nT on the Boulder
magnetometer. Strong southward IMF Bz initiated severe (K9) storming
at middle and high latitudes in the 29/0600 - 0900Z period. Mostly
northward Bz occurred from 29/0900 - 1800Z; however, major to severe
storming persisted. A sharp southward turn in the Bz occurred at
around 1800Z ending the period with K8-9 severe storming.  A strong
Forbush decrease (over 20%) is in progress.
D.  Stratwarm:  None
E.  Daily Indices: (real-time preliminary/estimated values)
10 cm 279  SSN 330  Afr/Ap 180/189   X-ray Background C3.3
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 3.0e+09   GT 10 MeV 7.7e+08 p/(cm2-ster-day)
(GOES-11 satellite synchronous orbit W108 degrees)
Daily Electron Fluence
GT 2 MeV 4.70e+06 e/(cm2-ster-day)
(GOES-12 satellite synchronous orbit W77 degrees)
3 Hour K-indices:
Boulder 4 3 9 7 6 7 9 8 Planetary 4 3 9 8 7 7 9 8
F.  Comments:  None