Viewing archive of Saturday, 12 August 2000

Geophysical report

Solar and Geophysical Activity Summary 2000 Aug 12 0245 UTC
Prepared 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 AUG
A. 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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