Viewing archive of Thursday, 16 September 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 Sep 16 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 259 Issued at 0245Z on 16 SEP 1999 This report is compiled from data received at SWO on 15 SEP
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0422 0427 0430              C1.1     450
1049 1050 1050                       120
1119 1121 1125                       110
2106 2108 2109  8699 N22W20 C1.5  SF 230
B. Proton Events
None
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD RANGED FROM QUIET TO MINOR STORM LEVELS WITH A PERIOD OF SEVERE STORM LEVELS AT HIGH LATITUDE. A SUDDEN IMPULSE WAS OBSERVED AT 15/2019Z, MEASURING 8 NT IN BOULDER.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 155  SSN 155  AFR/AP 026/032   X-RAY BACKGROUND B6.9
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 4.3E+06   GT 10 MEV 1.6E+04 P/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
DAILY ELECTRON FLUENCE
GT 2 MEV 4.00E+08 E/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
3 HOUR K-INDICES:
BOULDER 4 4 5 5 3 2 2 1 PLANETARY 4 3 5 7 4 3 3 2
F. Comments
  THE GREATER THAN 2 MEV ELECTRON FLUENCE ATTAINED
MODERATE LEVELS FOR THE 15TH OF SEPTEMBER.


All times in UTC

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