Viewing archive of Saturday, 12 August 2000
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 2000 Aug 12 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 225 Issued at 0245Z on 12 AUG 2000 This report is compiled from data received at SWO on 11 AUGA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0626 0626 0627 100 0635 0640 0644 200 1404 1405 1405 100
B. Proton Events
A SATELLITE PROTON EVENT AT GREATER THAN 10 MEV
BEGAN AT 1650Z. THIS VERY SMALL EVENT REACHED A MAXIMUM OF 17 PFU AT
1655Z AND ENDED AT 1740Z. A SMALL PCA OF APPROXIMATELY 2.0 DB
OCCURRED AT THULE CONCURRENT WITH THE PROTON EVENT. THE SOLAR SOURCE
OF THE PARTICLES IS AS YET UNDETERMINED.
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD WAS AT
UNSETTLED TO SEVERE STORM LEVELS. A PROLONGED PERIOD OF STEADY
SOUTHWARD IMF LASTING MORE THAN 24 HOURS FUELED THE DISTURBANCE. THE
BZ MAGNITUDE WAS NEARLY CONSTANT NEAR 10 NT. AT APPROXIMATELY 1800Z,
A SHOCK PASSED ACE AND ENDED THE NEAR STEADY-STATE OF THE SOLAR
WIND. THE SOLAR WIND SPEED AND DENSITY WERE QUITE AVERAGE PRIOR TO
THE SHOCK, BUT ATTAINED VALUES NEAR 600 KM/S, AND 10 P/CC AFTER.
THIS TRANSIENT MAY BE RELATED TO THE HALO CME OF 09 AUGUST.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 187 SSN 170 AFR/AP 039/060 X-RAY BACKGROUND B8.2 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 7.7E+06 GT 10 MEV 8.0E+04 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 3.10E+07 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 5 7 6 5 4 3 3 6 PLANETARY 6 6 7 6 4 4 4 5
F. Comments
None
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