Viewing archive of Thursday, 23 September 1999

Geophysical report

Solar and Geophysical Activity Summary 1999 Sep 23 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 266 Issued at 0245Z on 23 SEP 1999 This report is compiled from data received at SWO on 22 SEP
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
1329 1340 1353  8706 N17E39 C5.2  1F 130    23
B. Proton Events
None
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD WAS AT QUIET TO MAJOR STORM LEVELS. A SMALL SUDDEN IMPULSE, MEASURED AT BOULDER TO BE 8 NANOTESLA, OCCURRED AT 1222Z. SATELLITE DATA FROM ACE SHOWED THE PASSAGE OF AN INTERPLANETARY SHOCK JUST PRIOR. SOLAR WIND SPEEDS NEAR 600 KM/S, AND BZ MEASURING NEAR -15 NT ARE NOW OCCURRING.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 140  SSN 103  AFR/AP 029/037   X-RAY BACKGROUND B4.0
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 1.8E+06   GT 10 MEV 1.3E+04 P/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
DAILY ELECTRON FLUENCE
GT 2 MEV 6.60E+05 E/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
3 HOUR K-INDICES:
BOULDER 3 2 3 4 4 3 5 6 PLANETARY 3 2 3 3 4 3 5 7
F. Comments
  None


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