Viewing archive of Saturday, 26 September 1998

Geophysical report

Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Solar and Geophysical Activity Summary 1998 Sep 26 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 269 Issued at 0245Z on 26 SEP 1998 This report is compiled from data received at SWO on 25 SEP
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0006 0009 0009                       500
0108 0109 0111                       720
0238 0243 0245                       640
0556 0557 0558                       610
0612 0612 0612                       260
0616 0617 0617                       850
0641 0643 0646                       580
0715 0717 0718                       830
0742 0742 0743                       560
0804 0804 0805                       580
1009 1011 1012                       960
B. Proton Events
A GREATER THAN 10 MEV PROTON EVENT BEGAN AT 25/0010Z, REACHED A MAXIMUM OF 44 PFU AT 25/0130Z, AND ENDED AT 25/0230Z. THE EVENT WAS LIKELY ASSOCIATED WITH THE M7/3B ON 23/0713Z.
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD REACHED ACTIVE TO SEVERE STORM LEVELS SOON AFTER THE SHOCK AT GEOSYNCHRONOUS ORBIT AT 24/2315Z. K-INDICES REACHED 9 AT BOTH MID AND HIGH LATITUDES DURING THE 06-09Z INTERVAL. THE FIELD RETURNED TO QUIET TO UNSETTLED LEVELS BY THE END OF THE PERIOD. THE GREATER THAN 2 MEV ENERGETIC ELECTRON FLUX REACHED HIGH LEVELS BETWEEN 25/1830 - 2115Z.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 139  SSN 118  AFR/AP 097/121   X-RAY BACKGROUND B3.7
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 1.1E+08   GT 10 MEV 3.4E+05 P/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
DAILY ELECTRON FLUENCE
GT 2 MEV 5.20E+07 E/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
3 HOUR K-INDICES:
BOULDER 6 6 9 7 5 3 2 2 PLANETARY 7 8 9 7 7 5 3 3
F. Comments
  None


All times in UTC

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