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 UTCPrepared 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 SEPA. 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
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