Viewing archive of Thursday, 27 August 1998

Geophysical report

Solar and Geophysical Activity Summary 1998 Aug 27 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 239 Issued at 0245Z on 27 AUG 1998 This report is compiled from data received at SWO on 26 AUG
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0557 0557 0558                       490
1116 1116 1117                       510
B. Proton Events
THE GREATER THAN 100 MEV ALERT WAS CANCELLED AT 26/2045UT. THE PEAK FLUX FOR 100 MEV PARTICLES WAS 3.7 PFU ON 25/0055UT. THE GREATER THAN 10 MEV ALERT CONTINUES WITH FLUXES AT THE END OF THE UT DAY NEAR 70 PFU. THE RUNNING PEAK FOR GT 10 MEV FLUX WAS 665 PFU AT 26/1055UT.
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD HAS BEEN AT ACTIVE TO MINOR STORM CONDITIONS. A SUDDEN IMPULSE WAS OBSERVED AT 26/0651 UT. AFTER THE IMPULSE, MID-LATITUDE K-INDICES UP TO 5 WERE OBSERVED. A SECONDARY SURGE IN THE SOLAR WIND WAS OBSERVED AT APPROXIMATELY 1700 UT. THE SPEED ROSE AND LEVELED OUT OVER 800 KM/S, THE DENSITY INCREASED FROM 2 TO 10 P/CC, AND THE BZ WENT FROM -2 NT TO -12 NT. THE FINAL K VALUE FOR 26 AUG WAS A 5.
D. Stratwarm
None.
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 127  SSN 146  AFR/AP 031/039   X-RAY BACKGROUND B2.4
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 4.8E+08   GT 10 MEV 2.9E+07 P/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
DAILY ELECTRON FLUENCE
GT 2 MEV 3.00E+07 E/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
3 HOUR K-INDICES:
BOULDER 3 3 5 5 4 4 4 5 PLANETARY 2 3 5 6 5 5 5 5
F. Comments
  None.


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