Viewing archive of Tuesday, 18 January 2005

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.
:Product: 20050118SGAS.txt :Issued: 2005 Jan 18 0250 UT Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 018 Issued at 0245Z on 18 Jan 2005 This report is compiled from data received at SWO on 17 Jan
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
 0310 0321 0332  0720        M2.6                                   
 0659 0952 1007  0720        X3.8  2f 39000  12000  II/IV           
B. Proton Events
The proton event at greater than 10 MeV that began on 16/0210 UTC remains in progress. The X3 flare which occurred at 17/0952 UTC has increased the current peak flux to 5040 pfu observed at 17/1750 UTC. A proton event at greater than 100 MeV also resulted from the X3 flare, beginning at 17/1215 UTC and with a current peak flux of 28 pfu observed at 17/1700 UTC.
C. Geomagnetic Activity Summary
The geomagnetic field ranged from unsettled to severe storm levels. Solar wind conditions observed by the NASA ACE spacecraft show a fairly complex onset of activity which may suggest the arrival of a solar wind structure from combined CMEs expected from previous major flares on 15 January.
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 138  SSN 107  Afr/Ap 046/063   X-ray Background C1.5
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 6.2e+08   GT 10 MeV 1.1e+08 p/(cm2-ster-day)
(GOES-11 satellite synchronous orbit W107 degrees)
Daily Electron Fluence
GT 2 MeV 1.40e+07 e/(cm2-ster-day)
(GOES-12 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 4 4 3 6 6 6 5 3 Planetary 5 4 3 7 7 7 5 3 
F. Comments
  The Afr index reported in Part E is estimated from
Boulder observations.

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