Viewing archive of Friday, 20 April 2001
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 2001 Apr 20 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 110 Issued at 0245Z on 20 Apr 2001 This report is compiled from data received at SWO on 19 AprA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0217 0000 0000 II 1122 1135 1155 M2.0 270
B. Proton Events
None
C. Geomagnetic Activity Summary
The geomagnetic field has been
quiet to unsettled. The greater than 100 MeV proton event ended at
19/0325 UTC (start 18/0315 UTC, 12 pfu peak at 18/0600 UTC). The
polar cap absorption (PCA) event has also ended (19/1400 UTC). The
greater than 10 MeV proton event continues in progress (start
18/0315 UTC, 321 pfu peak at 18/1045 UTC, and current flux about 15
pfu at 19/2100 UTC) and is slowly decaying.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 145 SSN 085 Afr/Ap 008/007 X-ray Background B5.5 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.6e+07 GT 10 MeV 2.9e+06 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 6.80e+05 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 3 2 2 2 3 3 2 1 Planetary 3 2 3 1 2 2 1 2
F. Comments
None
All times in UTC
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