Viewing archive of Sunday, 23 August 1998

Geophysical report

Solar and Geophysical Activity Summary 1998 Aug 23 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 235 Issued at 0245Z on 23 AUG 1998 This report is compiled from data received at SWO on 22 AUG
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0000 0010 0140  8307 N42E51       2B               II/IV
1304 1307 1310  8307 N30E45 C1.4  SF 440
1414 1414 1414                       100
1503 1506 1509  8307 N30E44 C1.9  SF 1100   17
B. Proton Events
None
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FILED WAS PREDOMINANTLY QUIET EARLY IN THE PERIOD. A DISTURBANCE OCCURRED BETWEEN 22/0600UT TO APPROXIMATELY 22/1300UT. ACTIVE TO MAJOR STORM CONDITIONS WERE OBSERVED DURING THAT TIME. SOME HIGH LATITUDE SENSORS RECORDED PERIODS OF SEVERE STORMING. THE FIELD WAS UNSETTLED TO SLIGHTLY ACTIVE FOR THE REMAINDER OF THE PERIOD. SOLAR WIND DATA DURING THE DISTURBANCE SHOWED A LOW SPEED. MODERATELY HIGH DENSITY FLOW IN THE VICINITY OF THE EARTH. THESE SOLAR WIND CONDITIONS ARE NOT CHARACTERISTIC OF CORONAL HOLE RELATED STREAMS. HOWEVER, AT THE END OF THE PERIOD, SOLAR WIND VELOCITY WAS INCREASING AND DENSITY DECREASING. THE GREATER THAT 10 MEV PROTON FLUXES HAVE BEEN SLIGHTLY ELEVATED ABOVE BACKGROUND BUT BELOW THRESHOLD SINCE EARLY ON 20 AUG.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 133  SSN 102  AFR/AP 013/023   X-RAY BACKGROUND C1.6
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 1.3E+06   GT 10 MEV 5.6E+04 P/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
DAILY ELECTRON FLUENCE
GT 2 MEV 2.70E+05 E/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
3 HOUR K-INDICES:
BOULDER 1 2 4 5 3 3 3 3 PLANETARY 2 2 4 6 4 3 3 3
F. Comments
  None


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