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Geophysical report

Solar and Geophysical Activity Summary 2005 Sep 09 0248 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 252 Issued at 0245Z on 09 Sep 2005 This report is compiled from data received at SWO on 08 Sep
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
 1649 1703 1711  0808 S10E81 M2.1  Sf                               
 2023 2029 2041  0808        M2.1                                   
 2052 2106 2117  0808 S11E74 X5.4  2b        990       IV           
 2122 2134 2203                       210                           
B. Proton Events
A greater than 10 and greater than 100 MeV proton event occurred following yesterday's X17 flare on the southeast limb. The greater than 10 MeV proton event began at 08/0215Z and remains in progress. The peak flux so far was 112 pfu at 08/2155Z. The greater than 100 MeV proton event began at 08/0405Z and also remains in progress. The peak flux was 7.5 pfu at 08/1925Z. A greater than 100 MeV proton event from a source on the east limb is extremely rare.
C. Geomagnetic Activity Summary
The geomagnetic field was quiet to unsettled. A sudden disturbance of 41 nT (magnetic crochet) was observed in the geomagnetic field following today's X5 flare.
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 094  SSN 036  Afr/Ap 008/008   X-ray Background C1.0
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 1.9e+07   GT 10 MeV 3.3e+06 p/(cm2-ster-day)
(GOES-11 satellite synchronous orbit W113 degrees)
Daily Electron Fluence
GT 2 MeV 6.30e+08 e/(cm2-ster-day)
(GOES-12 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 2 2 1 1 3 3 2 2 Planetary 3 2 1 1 1 2 2 3 
F. Comments
  The grearter than 2 MeV electron fluence at
geosynchronous orbit was at high levels today.

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