Viewing archive of Friday, 4 April 2003

Geophysical report

Solar and Geophysical Activity Summary 2003 Apr 04 0245 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 094 Issued at 0245Z on 04 Apr 2003 This report is compiled from data received at SWO on 03 Apr
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
B. Proton Events
C. Geomagnetic Activity Summary
The geomagnetic field was at unsettled levels. The high speed stream which began on 30 March is subsiding, but continued instability in the interplanetary magnetic field is maintaining our unsettled activity levels. The greater than 2 MeV electrons at geosynchronous orbit reached high levels.
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 156  SSN 154  Afr/Ap ???/014   X-ray Background B6.5
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 1.4e+05   GT 10 MeV 1.1e+04 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 1.10e+08 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 3 3 3 3 3 3 3 3 Planetary 3 2 3 3 3 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 changeover.

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