Viewing archive of Thursday, 18 February 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 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


All times in UTC

<< 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%
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/10/31X2.03
Last M-flare2024/11/05M2.6
Last geomagnetic storm2024/10/12Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
September 2024141.4 -74.1
November 2024215.8 +74.4
Last 30 days161.1 +7.2

This day in history*

Solar flares
12013X4.93
21998X1.21
32014X1.14
42003M7.6
52004M5.72
DstG
12023-172G3
21991-92G2
31986-74G1
41959-73G1
51993-71G1
*since 1994

Social networks