Viewing archive of Friday, 9 April 1999

Geophysical report

Solar and Geophysical Activity Summary 1999 Apr 09 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 099 Issued at 0245Z on 09 APR 1999 This report is compiled from data received at SWO on 08 APR
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0025 0026 0028                       140
0559 0601 0601                       110
0930 0931 0931                       640
1100 1103 1107              B8.4     360
1607 1613 1617  8508 N23E18 M1.1  SF
B. Proton Events
None
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD BEGAN THE PERIOD AT QUIET LEVELS. ACTIVE CONDITIONS WERE OBSERVED DURING THE 08/1500-1800Z PERIOD. UNSETTLED CONDITIONS OCCURRED AT THE END OF THE PERIOD. NO SHOCK WAS OBSERVED IN THE NEARLY CONTINUOUS SOLAR WIND RECORD AND VELOCITY WAS RELATIVELY LOW BETWEEN 350-400 KM/S. ENERGETIC ELECTRON FLUXES AT GEOSYNCHRONOUS ORBIT REACHED HIGH LEVELS DURING THE PERIOD.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 139  SSN 125  AFR/AP 010/009   X-RAY BACKGROUND B4.8
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 2.1E+05   GT 10 MEV 1.7E+04 P/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
DAILY ELECTRON FLUENCE
GT 2 MEV 3.50E+07 E/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
3 HOUR K-INDICES:
BOULDER 1 2 2 2 2 4 3 2 PLANETARY 1 1 2 2 2 4 3 2
F. Comments
  None


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