Viewing archive of Monday, 12 April 2004

Geophysical report

Solar and Geophysical Activity Summary 2004 Apr 12 0245 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 103 Issued at 0245Z on 12 Apr 2004 This report is compiled from data received at SWO on 11 Apr
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
 0354 0419 0435  0588 S14W47 C9.6  1f 110    920                    
 1950 1950 1950                       1400                          
 2121 2122 2123                       670                           
B. Proton Events
A greater than 10 MeV proton event began at 11/1135Z. The peak so far has been 35 pfu at 11/1845Z. The event was in decline by the end of the period. This proton event is likely associated with the C9 flare at 11/0419Z.
C. Geomagnetic Activity Summary
The geomagnetic field was quiet to unsettled. Solar wind speed began the period at elevated levels (over 500 km/s) following yesterday's CME arrival at 10/1925Z. However, IMF Bz stayed predominantly northward and as a result, the geomagnetic disturbance was weak.
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 090  SSN 016  Afr/Ap 010/008   X-ray Background A6.5
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 1.8e+07   GT 10 MeV 1.0e+06 p/(cm2-ster-day)
(GOES-11 satellite synchronous orbit W98 degrees)
Daily Electron Fluence
GT 2 MeV 2.50e+07 e/(cm2-ster-day)
(GOES-12 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 3 2 3 1 2 3 2 3 Planetary 3 2 3 2 2 2 2 2 
F. Comments

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