Viewing archive of Sunday, 18 August 2002

Geophysical report

Solar and Geophysical Activity Summary 2002 Aug 18 0245 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 230 Issued at 0245Z on 18 Aug 2002 This report is compiled from data received at SWO on 17 Aug
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0058 0108 0114  0083 S19E77 M1.1  Sf
2039 2051 2057  0069 S06W05 M3.4  Sf
2304 0000 0000                                        IV
2323 2323 2323                       190
B. Proton Events
C. Geomagnetic Activity Summary
The geomagnetic field was at quiet to unsettled condition with one three-hour period of isolated active levels at 17/0900 UTC. Greater than 2 MeV electron flux at geosynchronous orbit exceeded event threshold at 17/1405 UTC, reached a peak value of 1350 pfu at 17/1710 UTC and decreased below threshold levels at 17/1845 UTC. NASA/ACE data indicates that the solar wind velocities decreased throughout the day from a peak velocity of 600 km/s to around 450 km/s due to waning coronal hole effects.
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 227  SSN 270  Afr/Ap 011/013   X-ray Background C1.9
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 7.7e+06   GT 10 MeV 2.4e+05 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 5.30e+07 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 2 3 4 2 2 2 2 3 Planetary 2 3 4 3 2 2 3 3
F. Comments

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