Viewing archive of Monday, 21 April 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 Apr 21 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 111 Issued at 2200Z on 21 APR 1997

IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z

SOLAR ACTIVITY WAS VERY LOW. NO FLARES OCCURRED AS THE VISIBLE DISK REMAINED SPOTLESS.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY LOW.
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
THE GEOMAGNETIC FIELD HAS BEEN QUIET TO ACTIVE FOR THE PAST 24 HOURS. THE GREATER THAN 2 MEV ELECTRON FLUX WAS MODERATE TO HIGH.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE MOSTLY UNSETTLED FOR THE NEXT 24 HOURS, WITH THE CONTINUED CHANCE FOR ISOLATED PERIODS OF ACTIVE CONDITIONS. ACTIVITY ON DAYS TWO AND THREE IS EXPECTED TO DECREASE TO QUIET TO UNSETTLED.
III. Event Probabilities 22 APR to 24 APR
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       21 APR 070
  Predicted   22 APR-24 APR  071/071/071
  90 Day Mean        21 APR 074
V. Geomagnetic A Indices
OBSERVED AFR/AP 20 APR  006/004
ESTIMATED AFR/AP 21 APR  011/010
PREDICTED AFR/AP 22 APR-24 APR  012/015-012/010-010/010
VI. Geomagnetic Activity Probabilities 22 APR to 24 APR
A. Middle Latitudes
Active35%25%20%
Minor storm15%10%05%
Major-severe storm05%05%01%
B. High Latitudes
Active35%25%20%
Minor storm15%10%05%
Major-severe storm05%05%01%

All times in UTC

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