Viewing archive of Saturday, 17 May 2003

Geophysical report

Solar and Geophysical Activity Summary 2003 May 17 0245 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 137 Issued at 0245Z on 17 May 2003 This report is compiled from data received at SWO on 16 May
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 level. Solar wind velocity continues to decrease as the previous coronal hole rotates across the west limb. The greater than 2 MeV electron flux was at high levels today.
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 103  SSN 097  Afr/Ap 009/009   X-ray Background B1.5
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 7.7e+05   GT 10 MeV 1.1e+04 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W92 degrees)
Daily Electron Fluence
GT 2 MeV 4.50e+08 e/(cm2-ster-day)
(GOES-12 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 3 2 2 2 2 3 2 2 Planetary 3 2 2 2 2 2 3 3
F. Comments
  The GOES 10 energetic proton detectors are showing
intermittent, high noise levels in the higher energy proton channels
(greater than about 80 MeV). This problem was first noticed in data
taken April 26, 2003. To ensure continued operational monitoring of
important energetic particle data, it is necessary to reassign
primary/secondary designations for the GOES Space Environment
Monitor (SEM) detectors. As of 1500 UT on May 15, GOES-8 became the
primary satellite for protons. GOES 12 will be the primary satellite
for magnetometer, X-ray, and electron measurements. GOES 10 will be
the secondary satellite for all SEM sensors - magnetometer, X-ray
sensor, and energetic particle sensor. This short-term solution
(approximately 2 - 3 months) will be in place until we define and
implement a permanent fix. A more detailed explanation can be found

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