Viewing archive of Tuesday, 27 April 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 Apr 27 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 117 Issued at 0245Z on 27 APR 1999 This report is compiled from data received at SWO on 26 APRA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0416 0416 0417 130
B. Proton Events
None
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD WAS QUIET
UNTIL 26/1000Z. ACTIVITY INCREASED SLIGHTLY DURING THE REMAINDER OF
THE DAY WITH BRIEF, INTERMITTENT ACTIVE TO MINOR STORM PERIODS (THE
MINOR STORM PERIODS WERE LIMITED TO HIGH LATITUDES).
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 105 SSN 069 AFR/AP 006/008 X-RAY BACKGROUND A9.1 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 1.3E+06 GT 10 MEV 1.1E+05 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 2.00E+07 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 1 0 1 3 3 2 2 1 PLANETARY 1 0 1 3 3 3 2 1
F. Comments
None
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