Viewing archive of Thursday, 20 February 1997

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 1997 Feb 20 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 051 Issued at 2200Z on 20 FEB 1997

IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z

SOLAR ACTIVITY WAS LOW AS FOUR C-CLASS X-RAY EVENTS OCCURRED DURING THE PAST 24 HOURS, THE FIRST AN OPTICALLY CORRELATED C3 FLARE AT 19/2223Z. THE LARGEST EVENT, A C4 FLARE, OCCURRED AT 20/1144Z. ALL EVENTS EMENATED FROM REGION 8018 (N05W89) WHILE IT WAS A SINGLE SPOT 'AXX' GROUP. THE REGION HAS SINCE DECAYED INTO A SPOTLESS PLAGE AS IT ROTATES OFF THE WEST LIMB.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY LOW.
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
THE GEOMAGNETIC FIELD HAS BEEN QUIET AT ALL LATITUDES FOR THE PAST 24 HOURS. AN 18-DEGREE LONG FILAMENT AT LOCATION S44W09 DISAPPEARED FROM THE DISK DURING THE INTERVAL 20/0100-0406Z.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED FOR THE NEXT THREE DAYS, WITH AN INCREASED CHANCE FOR ISOLATED PERIODS OF ACTIVE CONDITIONS ON DAY THREE.
III. Event Probabilities 21 FEB to 23 FEB
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       20 FEB 073
  Predicted   21 FEB-23 FEB  073/073/073
  90 Day Mean        20 FEB 077
V. Geomagnetic A Indices
OBSERVED AFR/AP 19 FEB  004/003
ESTIMATED AFR/AP 20 FEB  005/005
PREDICTED AFR/AP 21 FEB-23 FEB  005/005-010/010-015/010
VI. Geomagnetic Activity Probabilities 21 FEB to 23 FEB
A. Middle Latitudes
Active15%15%25%
Minor storm05%05%15%
Major-severe storm01%01%05%
B. High Latitudes
Active15%15%30%
Minor storm05%05%15%
Major-severe storm01%01%01%

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!

SpaceWeatherLive Pro
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/12/08X2.2
Last M-flare2024/12/22M1.1
Last geomagnetic storm2024/12/17Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
November 2024152.5 -13.9
December 2024103.3 -49.2
Last 30 days114 -43.9

This day in history*

Solar flares
12015M6.75
21998M3.34
32013M2.36
42013M1.97
52001M1.69
DstG
12002-67
22000-62G2
31989-60
42014-57
51982-53G1
*since 1994

Social networks