Viewing archive of Thursday, 21 February 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 Feb 21 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 052 Issued at 0245Z on 21 Feb 2002 This report is compiled from data received at SWO on 20 FebA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0244 0251 0256 9825 N15W58 M4.2 Sf 140 28 0313 0000 0319 II 0327 0000 0339 II 0552 0612 0616 9825 N12W72 M5.1 1n 44 49 II/IV 0946 0959 1004 9825 N18W83 M4.3 Sf 38 1102 1107 1112 9825 N15W77 C7.5 Sf 270 38 1703 1711 1718 9835 S09W62 M3.5 Sf 56 2100 2107 2109 9830 S18W11 M2.4 1b 85 2333 2333 2333 220
B. Proton Events
A brief greater than 10 MeV proton event began at
20/0730 UT, reached a maximum of 13.5 PFU at 20/1755 UT, and ended
at 20/0800 UT.
C. Geomagnetic Activity Summary
Activity was at quiet to unsettled
levels.
D. Stratwarm
Stratwarm Alert Exists Stratwarm Wednesday
The circulation is relaxing after the major warming. There exists a
reversed temperature gradient at 60N from 50 HPA to 2 HPA and
easterly winds from 5 HPA to 1 HPA.
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 193 SSN 157 Afr/Ap 010/008 X-ray Background B9.5 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.4e+06 GT 10 MeV 1.6e+05 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 2 1 3 2 3 3 2 3 Planetary 2 0 3 2 3 2 2 3
F. Comments
Afr estimated, based upon Boulder USGS magnetometer data.
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