Viewing archive of Thursday, 25 April 2002
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 2002 Apr 25 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 115 Issued at 0245Z on 25 Apr 2002 This report is compiled from data received at SWO on 24 AprA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0246 0246 0246 150 1121 1122 1129 9915 N12E17 Sf 2500 1312 1316 1326 S18E01 C1.0 Sf 630 1335 1342 1354 S18E00 Sf 110 1707 1707 1709 130 1743 1754 1805 C1.9 400 2146 2156 2201 9912 N09W49 M1.7 1f 2229 2230 2230 170
B. Proton Events
The greater than 10 MeV proton event that began
at 21/0225 UTC continued. The greater than 10 MeV flux at the close
of the period was around 22 pfu and gradually decreasing.
C. Geomagnetic Activity Summary
Geomagnetic field activity was at
quiet to unsettled levels.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 177 SSN 256 Afr/Ap 007/007 X-ray Background B9.2 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.7e+07 GT 10 MeV 5.6e+06 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 2.70e+05 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 3 1 1 2 2 3 1 2 Planetary 3 1 1 2 2 3 2 2
F. Comments
Afr estimated based on Boulder USGS magnetometer data.
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