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Geophysical report

Solar and Geophysical Activity Summary 2003 Nov 01 0245 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 305 Issued at 0245Z on 01 Nov 2003 This report is compiled from data received at SWO on 31 Oct
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0353 0353 0353                       300
0426 0433 0437              M2.0            67
0552 0553 0553                       590
0608 0616 0628  0488 N08W28 M1.1  Sf
1121 1122 1125                       200    140
1141 1142 1142                       240
1507 1507 1508                       120
1644 1706 1748  0486 S20W28 C5.3  Sf 220    37
1844 1844 1845                       730
2006 2006 2007                       1000
B. Proton Events
The greater than 100 MeV proton event in progress since 28/1145Z, ended at 31/0145Z. This prolonged high energy proton event was actually two distinct events associated with the X17 and X10 flares on the 28th and 29th respectively. The peak measurements for both events were 186 pfu at 29/0015Z and 110 pfu at 29/2310Z. The greater than 10 MeV proton event remains in progress, but is quickly declining to the 10 pfu alert threshold. The two peak measurements at 10 MeV were 29,000 pfu at 29/0615Z and 3300 pfu at 30/1935Z. The PCA event has ended.
C. Geomagnetic Activity Summary
The geomagnetic field ranged from active to severe storm levels. The intense geomagnetic storm that began at around 30/1600Z, continued into the early stages of this period. Severe storm levels persisted from 31/0000Z through 31/0900Z. Mostly active to major storm periods occurred through the latter half of the period. Solar radiation contamination on the ACE SWEPAM instrument finally ended at 31/0052Z. Solar wind speed was at an exceptionally high 1200 km/s, but has been in a gradual decline, ending the period at over 800 km/s. The prolonged periods of southward IMF Bz that occurred early in the period have ended. Bz has been mostly northward since 31/0200Z.
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 249  SSN 266  Afr/Ap 065/093   X-ray Background C1.8
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 9.8e+07   GT 10 MeV 7.0e+06 p/(cm2-ster-day)
(GOES-11 satellite synchronous orbit W107 degrees)
Daily Electron Fluence
GT 2 MeV 3.40e+06 e/(cm2-ster-day)
(GOES-12 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 7 6 7 5 5 4 3 4 Planetary 8 7 7 6 6 5 4 4
F. Comments

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