Viewing archive of Thursday, 18 February 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 Feb 18 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 049 Issued at 0245Z on 18 FEB 1999 This report is compiled from data received at SWO on 17 FEBA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0056 0059 0101 8462 N18W15 C3.2 SF 1400 36 0111 0111 0111 2000 0617 0617 0617 4800 0624 0624 0625 750 0637 0637 0638 1300 0650 0650 0651 760 0718 0718 0719 1100 0758 0758 0758 1400 0855 0855 0856 980 1627 1646 1708 C3.4 1200 2115 2116 2118 1900 2123 2123 2124 2700 2126 2126 2127 2000 2332 2332 2333 870
B. Proton Events
None
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD WAS AT QUIET
TO MINOR STORM LEVELS. A TRANSIENT STRUCTURE WAS SEEN TO PASS ACE
AROUND 0500Z, WITH ELEVATED SPEED AND PROLONGED SOUTHWARD BZ.
CONDITIONS HAVE SINCE STABILIZED WITH NOMINAL CONDITIONS NOW
OCCURRING.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 190 SSN 135 AFR/AP 015/016 X-RAY BACKGROUND B7.2 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 4.0E+06 GT 10 MEV 1.7E+04 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 2.90E+06 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 1 3 3 4 5 2 1 1 PLANETARY 0 2 3 4 5 3 2 2
F. Comments
None
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