Viewing archive of Friday, 13 March 1998

Solar activity 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.
Report of Solar-Geophysical Activity 1998 Mar 13 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 072 Issued at 2200Z on 13 MAR 1998

IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z

SOLAR ACTIVITY WAS LOW. X-RAYS PASSED THE C-LEVEL VERY LATE IN THE PERIOD, REACHING THE C5 LEVEL AT 2108Z. AT THIS WRITING NO OPTICAL REPORT HAS BEEN RECEIVED. NEW SPOTS EMERGED IN PREVIOUSLY SPOTLESS REGION 8173 (S19W83). THIS WAS THE SITE OF A SUBFLARE AND OCCASIONAL SURGING. THE OTHER 6 SPOTTED REGIONS VISIBLE WERE SIMPLIFYING, IN GENERAL. REGION 8176 (S40W07) LOST SPOTS BUT GAINED AREA AS DEVELOPMENT OCCURRED IN THE TRAILER.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE. SHORT-LIVED SUBSTORMS OCCURRED DURING LOCAL NIGHTTIMES. THE GREATER THAN 2 MEV ELECTRON FLUX AT GEOSYNCHRONOUS ORBIT REMAINED HIGH.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED. BRIEF SUBSTORMS MAY PERSIST DURING LOCAL NIGHTTIMES FOR THE NEXT DAY.
III. Event Probabilities 14 MAR to 16 MAR
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       13 MAR 105
  Predicted   14 MAR-16 MAR  105/105/105
  90 Day Mean        13 MAR 095
V. Geomagnetic A Indices
OBSERVED AFR/AP 12 MAR  008/012
ESTIMATED AFR/AP 13 MAR  010/010
PREDICTED AFR/AP 14 MAR-16 MAR  005/008-005/005-010/008
VI. Geomagnetic Activity Probabilities 14 MAR to 16 MAR
A. Middle Latitudes
Active10%10%20%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active20%20%20%
Minor storm10%10%10%
Major-severe storm01%01%01%

<< 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!

23%
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/03/28X1.1
Last M-flare2024/03/29M3.2
Last geomagnetic storm2024/03/25Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
February 2024124.7 +1.7

This day in history*

Solar flares
12001X2.45
22014X1.45
32023X1.2
42024M3.2
52001M3.13
ApG
1199928G2
2200337G1
3201328G1
4200122G1
5199820G1
*since 1994

Social networks