Viewing archive of Monday, 25 January 1999

Geophysical report

Solar and Geophysical Activity Summary 1999 Jan 25 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 025 Issued at 0245Z on 25 JAN 1999 This report is compiled from data received at SWO on 24 JAN
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
1221 1237 1250  8439 S25W68 C2.0  SF 150
1730 1731 1734                       180
B. Proton Events
THE GT 10 MEV PROTON FLUX REMAINED ENHANCED BUT BELOW EVENT LEVEL FOR THE ENTIRE PERIOD.
C. Geomagnetic Activity Summary
DURING THE FIRST HALF OF THE PERIOD, THE GEOMAGNETIC FIELD WAS AT UNSETTLED TO ACTIVE LEVELS. QUIET TO UNSETTLED CONDITIONS WERE OBSERVED DURING THE LATTER HALF. A FORBUSH DECREASE BEGAN EARLY ON 23 JAN. THE NEUTRON FLUX DURING THE EVENT WAS DEPRESSED BY APPROXIMATELY 6 PERCENT NEAR MIDDAY ON 24 JAN. AT THE END OF THE PERIOD, THE FORBUSH DECREASE WAS SLOWLY RECOVERING TO NORMAL VALUES.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 162  SSN 107  AFR/AP 011/013   X-RAY BACKGROUND C1.0
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 1.0E+07   GT 10 MEV 1.8E+05 P/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
DAILY ELECTRON FLUENCE
GT 2 MEV 7.80E+06 E/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
3 HOUR K-INDICES:
BOULDER 3 4 3 2 2 3 2 2 PLANETARY 4 3 3 3 2 3 3 1
F. Comments
  None


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