Viewing archive of Thursday, 18 February 1999

Geophysical report

Solar and Geophysical Activity Summary 1999 Feb 18 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 049 Issued at 0245Z on 18 FEB 1999 This report is compiled from data received at SWO on 17 FEB
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0056 0059 0101  8462 N18W15 C3.2  SF 1400   36
0111 0111 0111                       2000
0617 0617 0617                       4800
0624 0624 0625                       750
0637 0637 0638                       1300
0650 0650 0651                       760
0718 0718 0719                       1100
0758 0758 0758                       1400
0855 0855 0856                       980
1627 1646 1708              C3.4     1200
2115 2116 2118                       1900
2123 2123 2124                       2700
2126 2126 2127                       2000
2332 2332 2333                       870
B. Proton Events
None
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD WAS AT QUIET TO MINOR STORM LEVELS. A TRANSIENT STRUCTURE WAS SEEN TO PASS ACE AROUND 0500Z, WITH ELEVATED SPEED AND PROLONGED SOUTHWARD BZ. CONDITIONS HAVE SINCE STABILIZED WITH NOMINAL CONDITIONS NOW OCCURRING.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 190  SSN 135  AFR/AP 015/016   X-RAY BACKGROUND B7.2
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 4.0E+06   GT 10 MEV 1.7E+04 P/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
DAILY ELECTRON FLUENCE
GT 2 MEV 2.90E+06 E/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
3 HOUR K-INDICES:
BOULDER 1 3 3 4 5 2 1 1 PLANETARY 0 2 3 4 5 3 2 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!

12%

Space weather facts

Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2020/02/19Kp5 (G1)
Number of spotless days in 2020:74
Current stretch spotless days:3

This day in history*

Solar flares
12006C9.7
22002C9.6
31997C6.8
42002C6.0
52002C4.4
ApG
11995100G4
2200074G4
3199441G1
4201022
5200120G1
*since 1994

Social networks