Viewing archive of Friday, 17 September 1999

Geophysical report

Solar and Geophysical Activity Summary 1999 Sep 17 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 260 Issued at 0245Z on 17 SEP 1999 This report is compiled from data received at SWO on 16 SEP
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
2145 2145 2146                       190
B. Proton Events
None
C. Geomagnetic Activity Summary
FIELD ACTIVITY VARIED FROM QUIET TO MINOR STORM LEVELS WITH BRIEF MAJOR TO SEVERE STORM INTERVALS AT HIGH LATITUDES. MOST OF THE INCREASED ACTIVITY, ESPECIALLY THE STORM PERIODS, OCCURRED BEFORE 16/1200Z.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 158  SSN 153  AFR/AP 025/032   X-RAY BACKGROUND B5.7
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 2.0E+06   GT 10 MEV 1.3E+04 P/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
DAILY ELECTRON FLUENCE
GT 2 MEV 1.70E+08 E/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
3 HOUR K-INDICES:
BOULDER 4 5 5 5 2 3 2 3 PLANETARY 3 6 5 5 4 4 3 2
F. Comments
  None


<< Go to daily overview page

Latest news

Support SpaceWeatherLive.com!

A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!

100%

Space weather facts

Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/10/26Kp5 (G1)
Number of spotless days in 2019:239
Current stretch spotless days:12

This day in history*

Solar flares
11999M8.0
21999M5.6
32005M3.9
41999M2.8
52005M2.6
ApG
1199841G2
2200338G1
3201237G2
4199621G1
5201412
*since 1994

Social networks