Viewing archive of Friday, 30 May 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 May 30 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 150 Issued at 0245Z on 30 May 2003 This report is compiled from data received at SWO on 29 May
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0051 0105 0112  0365 S06W37 X1.2  2b 25000  730    II/IV
0209 0218 0224  0368 S37E03 M1.5  1f                  IV
1914 0000 2145                                        IV
1928 1937 1943  0368 S35W13 M2.8  1n 830    310    II
1948 0000 2040                                        IV
B. Proton Events
None
C. Geomagnetic Activity Summary
The geomagnetic field was at unsettled to severe storm levels. A recurrent coronal hole was responsible for the initial elevated conditions. At approximately 29/1155Z the first of two transients associated with the first two X-class flares from late on the 27th and early on the 28th passed the NASA/ACE space craft. The second occurred at approximately 29/1830Z and was responsible for the severe storm conditions seen late in the period. The greater than 10 MeV proton fluxes at geosynchronous orbit achieved event levels at 28/2335Z and reached a maximum of 121 pfu at 29/1530Z. The greater than 2 MeV electron fluxes at geosynchronous orbit reached high levels today.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 138  SSN 098  Afr/Ap 076/089   X-ray Background B3.0
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 2.4e+08   GT 10 MeV 2.9e+06 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W107 degrees)
Daily Electron Fluence
GT 2 MeV 4.80e+07 e/(cm2-ster-day)
(GOES-12 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 5 3 4 3 5 6 8 7 Planetary 5 4 4 3 6 7 8 8
F. Comments
  None

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