Viewing archive of Saturday, 31 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 31 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
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 MayA. 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
None
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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