Viewing archive of Wednesday, 4 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 04 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 094 Issued at 0245Z on 04 Apr 2001 This report is compiled from data received at SWO on 03 AprA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0325 0357 0455 9415 S21E83 X1.2 1n 470 3300 IV 1229 1234 1238 9393 N15W88 M2.4 2f 31 1952 1955 1957 130 2004 2005 2006 110 2317 2351 0004 M1.1
B. Proton Events
An energetic proton event resulted from the X20
flare. Greater than 20 MeV particles exceeded event threshold at
02/2340Z, and reached a maximum of 1,110 PFU at 03/0745Z. The 10
MeV particle event continues in progress but is slowly decreasing.
Greater than 100 MeV particles also exceeded event threshold,
beginning at 03/0120Z, reaching a maximum of 5.4 PFU at 03/0740Z.
The greater than 100 MeV particles decreased to event threshold
after 03/1900Z.
C. Geomagnetic Activity Summary
The geomagnetic field was quiet to
unsettled.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 223 SSN 228 Afr/Ap 005/005 X-ray Background M2.0 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 8.2e+07 GT 10 MeV 3.3e+07 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 1.00e+07 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 2 1 1 0 3 3 2 2 Planetary 2 1 1 1 2 3 2 2
F. Comments
None
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