Viewing archive of Friday, 31 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 31 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 304 Issued at 0245Z on 31 Oct 2003 This report is compiled from data received at SWO on 30 OctA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0156 0207 0229 0488 N08W22 M1.6 1f 0705 0705 0705 250 0720 0721 0721 120 1009 1009 1012 1500 1333 1333 1333 2500 1502 1504 1504 230 1515 1528 1537 0486 M1.5 29 1906 1906 1908 490 100 1918 1921 1927 C5.6 500
B. Proton Events
A new surge of high energy protons followed the
X-10 flare, enhancing the existing greater than 10 MeV and greater
than 100 MeV proton events from the X17 flare on the 28th. This
enhancement reached 110 pfu (29/2310Z) in the greater than 100 MeV
level, and 3300 pfu (30/1935Z) in the greater than 10 MeV level. A
polar cap absorption continues and the proton event remains in
progress.
C. Geomagnetic Activity Summary
The geomagnetic field was at
predominantly minor to severe storm levels. The intense geomagnetic
storm that began at 29/0611Z continued through the first half of
this period. Severe levels were observed from 30/0000 - 0600Z. A
short-lived "lull" (K5-6) in activity preceded the onset of another
severe geomagnetic storm. The very fast CME from the X10 flare that
peaked at 29/2049Z impacted the magnetic field at around 30/1600Z -
a remarkably fast 19-hour transit from Sun to Earth. Sustained
southward IMF Bz in the -15 to -30 Nt range is assuring a severe
response. A Forbush decrease at around 20% remains in progress.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 271 SSN 293 Afr/Ap 147/162 X-ray Background C2.8 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 7.7e+08 GT 10 MeV 1.4e+08 p/(cm2-ster-day) (GOES-11 satellite synchronous orbit W108 degrees) Daily Electron Fluence GT 2 MeV 1.90e+07 e/(cm2-ster-day) (GOES-12 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 7 7 5 5 4 7 8 9 Planetary 8 7 6 5 5 8 9 9
F. Comments
None
All times in UTC
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