Viewing archive of Friday, 26 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 26 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 116 Issued at 0245Z on 26 Apr 2002 This report is compiled from data received at SWO on 25 AprA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0353 0353 0354 100 0554 0602 0605 9912 N10W56 C2.5 Sf 1200 0906 0906 0906 230 1044 1044 1044 290 1851 1851 1851 140 2122 2122 2123 120
B. Proton Events
The greater than 10 MeV proton event that began
at 21/0225 UTC persisted, but just barely above event threshold (the
maximum for this event was 2520 pfu at 21/2320 UTC).
C. Geomagnetic Activity Summary
Geomagnetic field activity was at
mostly quiet levels.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 167 SSN 208 Afr/Ap 003/005 X-ray Background B5.9 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 3.3e+06 GT 10 MeV 1.2e+06 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 1.40e+06 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 2 1 0 1 2 2 1 0 Planetary 2 1 0 2 2 3 2 1
F. Comments
Afr estimated based on Boulder USGS magnetometer data.
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