Viewing archive of Thursday, 23 September 1999
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 1999 Sep 23 0245 UTCPrepared 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 SEPA. 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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