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 UTC
Prepared 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 Feb
A. 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.

All times in UTC

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