Viewing archive of Thursday, 20 July 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 Jul 20 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 202 Issued at 0245Z on 20 JUL 2000 This report is compiled from data received at SWO on 19 JULA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0020 0020 0020 140 0149 0149 0149 370 0427 0441 0449 9087 S19E13 C6.7 SF 330 0523 0524 0524 340 0645 0726 0750 9087 S21E12 M6.4 3N 2800 84 IV 0840 0840 0840 300 0900 0900 0900 340 1607 1611 1621 9077 N19W69 C3.4 SF 130 1630 1633 1638 9087 S12E03 C3.5 SF 370
B. Proton Events
THE GREATER THAN 10 MEV FLUX BEGAN THE PERIOD
NEAR 20 PFU AND DECAYED TO NEAR 10 PFU AT THE END OF THE PERIOD. A
SLIGHT INCREASE IN FLUX WAS OBSERVED AROUND 19/1500Z WHICH MAY HAVE
BEEN RELATED TO THE M6 FLARE MENTIONED ABOVE.
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD WAS QUIET TO
UNSETTLED FOR MOST OF THE PERIOD. A SHOCK WAS OBSERVED AT ACE AT
19/1450Z AND A SUDDEN IMPULSE WAS OBSERVED AT THE EARTH AT 19/1526Z.
UNSETTLED TO ACTIVE CONDITIONS FOLLOWED THE SHOCK PASSAGE. SOLAR
WIND VELOCITY JUMPED FROM APPROXIMATELY 450 KM/S TO OVER 600 KM/S.
THE LIKELY SOURCE OF THIS DISTURBANCE WAS A MASS EJECTION ON 17 JULY
THAT APPEARED TO BE DIRECTED OFF THE EAST LIMB OF THE SUN.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 250 SSN 342 AFR/AP 011/015 X-RAY BACKGROUND C2.1 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 1.5E+07 GT 10 MEV 1.3E+06 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 2.60E+06 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 2 1 1 1 1 4 3 4 PLANETARY 3 1 1 2 3 4 4 5
F. Comments
None
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