Viewing archive of Friday, 20 June 2003

Geophysical report

Solar and Geophysical Activity Summary 2003 Jun 20 0245 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 171 Issued at 0245Z on 20 Jun 2003 This report is compiled from data received at SWO on 19 Jun
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0111 0112 0112                       100
0319 0319 0319                       110
2013 2013 2013                       380
B. Proton Events
The greater than 10 MeV proton flux exceeded event threshold at 18/2050Z (reached a max of 24 pfu at 19/0450Z), ended at 19/1900Z and after careful review the event is believed to have been the result of the M6.8 x-ray flare from June 17.
C. Geomagnetic Activity Summary
The geomagnetic field was at predominantly active levels today. Minor storm conditions were observed at both middle and high latitudes between 19/0000 and 0300Z due to the influence of a recurrent high speed coronal hole stream. The greater than 2 MeV electron flux reached moderate levels today.
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 123  SSN 108  Afr/Ap 020/018   X-ray Background B2.9
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV MSG   GT 10 MeV 24 p/(cm2-ster-day)
(GOES-11 satellite synchronous orbit W113 degrees)
Daily Electron Fluence
GT 2 MeV 1.60e+07 e/(cm2-ster-day)
(GOES-12 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 5 4 4 4 3 2 2 2 Planetary 5 4 4 3 3 3 3 2
F. Comments
On 16 June, it was determined that a scaling problem exists with the Boulder magnetometer instrument.  While this problem, and its fix are being investigated the primary instrument for Boulder K-indices has been switched to the Boulder USGS (via Domsat) magnetometer, effective 1500 UTC on 16 June.

GOES Protons:
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. GOES 11 (113W) is now the primary satellite for protons. GOES 12 will continue as the primary satellite for magnetometer, X-ray, and electron measurements. GOES 10 (135W) will be the secondary satellite for all SEM sensors - magnetometer, X-ray, and energetic particles.  Because of the degraded state of the proton data on GOES-10, its designation as the secondary source for proton data is a short-term solution.  More permanent solutions have been identified and are being evaluated.  Users will be notified when we define and schedule a permanent fix.  Further details can be found at

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