Viewing archive of Wednesday, 18 August 1999

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 1999 Aug 18 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 230 Issued at 0245Z on 18 AUG 1999 This report is compiled from data received at SWO on 17 AUG
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0453 0000 0459                                     II
0837 0837 0837                       150
0848 0848 0849                       150
1232 1323 1357  8668 N26E35 C2.6  SF 130    67
1428 1602 1754  8668 N24E37 C5.9  SF 530    39
1433 1435 1440  8662 S17W81       SF               II
1644 1738 1905                       820
B. Proton Events
None
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD WAS AT ACTIVE TO MINOR STORM LEVELS THROUGHOUT THE PERIOD. A HIGH SPEED SOLAR WIND STREAM, REGISTERING BETWEEN 500 AND 700 KM/S, CONTINUES TO BUFFET THE MAGNETOPAUSE. THE FLUX OF GREATER THAN 2 MEV ELECTRONS AT GEOSYNCHRONOUS ORBIT REACHED HIGH LEVELS FROM APPROXIMATELY 1500 TO 1800Z.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 141  SSN 067  AFR/AP 030/027   X-RAY BACKGROUND B3.2
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 6.4E+05   GT 10 MEV 1.4E+04 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 5 5 5 4 4 4 3 2 PLANETARY 5 4 5 4 4 4 3 3
F. Comments
  None


All times in UTC

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