Viewing archive of Thursday, 3 April 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 Apr 03 0245 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 093 Issued at 0245Z on 03 Apr 2003 This report is compiled from data received at SWO on 02 Apr
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0331 0332 0332                       260
0738 0738 0738                       170
B. Proton Events
C. Geomagnetic Activity Summary
The geomagnetic field was at unsettled to active levels. The high speed stream that began on 30 March has gained slightly in strength to nearly 580 km/sec. Intermittently southward Bz has generated disturbed periods. The greater than 2 MeV electrons at geosynchronous orbit reached high levels.
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 158  SSN 189  Afr/Ap 021/020   X-ray Background B5.1
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 6.3e+05   GT 10 MeV 1.2e+04 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 1.60e+08 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 3 3 4 4 4 4 3 3 Planetary 2 4 4 4 4 3 3 4
F. Comments
  Beginning 1500 UTC April 8, SEC will begin using data
from the GOES 12 satellite, and stop receiving GOES 8 data. GOES 12
has the new Solar X-Ray Imager (SXI), which will acquire real-time,
operational images of the solar x-ray flux. With the switch from
GOES 8 to GOES 12, the primary/secondary designations will change.
GOES 12 will be the primary satellite for the SXI. All other data,
including magnetometer, XRS x-ray measurements, and energetic
particles, will have GOES 10 as their primary source, with GOES 12
as the secondary source where available. Please see for important information on this

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