Viewing archive of Thursday, 30 October 2003
Geophysical report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Solar and Geophysical Activity Summary 2003 Oct 30 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
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 OctA. 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
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