Viewing archive of Thursday, 20 July 2000

Geophysical report

Solar and Geophysical Activity Summary 2000 Jul 20 0245 UTC
Prepared 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 JUL
A. 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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