Viewing archive of Wednesday, 23 April 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 Apr 23 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 113 Issued at 0245Z on 23 Apr 2003 This report is compiled from data received at SWO on 22 AprA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0719 0719 0719 76 II 1613 1617 1622 0338 N20W17 C2.2 Sf 140 50 1941 2011 2037 0338 N20W14 C4.0 Sf 7500 IV
B. Proton Events
None
C. Geomagnetic Activity Summary
The geomagnetic field was
unsettled to active. A high speed solar wind stream that began early
on 21 April continues. Solar wind speeds exceeded 600 km/s early in
the period, but gradually declined to below 550 km/s by the end of
the period.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 132 SSN 147 Afr/Ap 019/022 X-ray Background B4.7 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 2.1e+06 GT 10 MeV 1.6e+04 p/(cm2-ster-day) (GOES-10 satellite synchronous orbit W135 degrees) Daily Electron Fluence GT 2 MeV 3.30e+08 e/(cm2-ster-day) (GOES-10 satellite synchronous orbit W135 degrees) 3 Hour K-indices Boulder 4 4 4 3 3 3 3 3 Planetary 4 4 4 4 3 3 3 4
F. Comments
The greater than 2 MeV electrons at geosynchronous orbit reached high levels again today.
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