Viewing archive of Friday, 20 September 2002

Geophysical report

Solar and Geophysical Activity Summary 2002 Sep 20 0245 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 263 Issued at 0245Z on 20 Sep 2002 This report is compiled from data received at SWO on 19 Sep
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0356 0356 0357                       130
0512 0528 0548  0125 S07E63 C4.7  1f               II
1708 1709 1713                       150
2026 2026 2026                       240
2240 2241 2241                       150
2251 2251 2252                       130
2334 2334 2334                       120
B. Proton Events
C. Geomagnetic Activity Summary
The geomagnetic field ranged from quiet to minor storm levels. A weak shock was observed at the ACE spacecraft just before 19/0600Z. Solar wind speed gradually increased to over 750 km/s by late in the period, but total magnetic field measurements and densities remained very low. This disturbance is likely associated with the C8 flare and CME observed on 17 September
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 165  SSN 206  Afr/Ap 016/013   X-ray Background B6.4
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 3.6e+05   GT 10 MeV 1.1e+04 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 2.90e+07 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 3 1 2 2 4 5 2 3 Planetary 3 2 1 2 4 4 3 3
F. Comments

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