Viewing archive of Saturday, 31 May 2003

Geophysical report

Solar and Geophysical Activity Summary 2003 May 31 0245 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 151 Issued at 0245Z on 31 May 2003 This report is compiled from data received at SWO on 30 May
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0548 0557 0603  0365 S05W54 C1.0  Sf 180
1954 1954 1954                       140
2059 2059 2059                       140
B. Proton Events
The proton event at greater than 10 MeV has ended: 28/2335 UTC start, 121 pfu peak at 29/1530 UTC, and 30/0110 UTC end.
C. Geomagnetic Activity Summary
The geomagnetic field ranged from unsettled to severe storm levels. The field was mostly unsettled to active since about 30/0600 UTC with a single minor storm period from 30/1500-1800 UTC. The CME associated with the X1 flare early on 29 May was apparently observed to encounter the ACE spacecraft at about 30/1600 UTC. The shock in solar wind parameters was not strong and an SI was not clearly observed by ground magnetometers.
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 117  SSN 062  Afr/Ap 035/049   X-ray Background B3.3
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 5.2e+07   GT 10 MeV 2.5e+05 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W108 degrees)
Daily Electron Fluence
GT 2 MeV 5.00e+05 e/(cm2-ster-day)
(GOES-12 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 7 4 3 3 4 5 4 4 Planetary 8 4 4 3 4 5 4 5
F. Comments
  The Afr index reported in Part E is estimated from
Boulder observations.

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