Viewing archive of Thursday, 24 August 2000

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 2000 Aug 24 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 237 Issued at 2200Z on 24 AUG 2000

IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z

SOLAR ACTIVITY CONTINUED AT A LOW LEVEL. THE LARGEST EVENT OF THE PERIOD WAS AN OPTICALLY UNCORRELATED C6 AT 24/0917Z. EUV IMAGERY INDICATE THIS EVENT ORIGINATED FROM BEHIND THE NORTHWEST LIMB WHERE REGION 9125 COMPLETED WEST LIMB TRANSIT ON 23 AUGUST. REGION 9131 (N14W72) GREW DURING THE PERIOD. TWO SMALL REGIONS ROTATED AROUND THE EAST LIMB AT N16E71 AND S18E70 AND WERE NUMBERED AS NEW REGIONS 9142 AND 9143 RESPECTIVELY. REGION 9143 IS THE LARGER OF THE TWO AND PRODUCED INFREQUENT SUBFLARES.
IB. Solar Activity Forecast
SOLAR ACTIVITY SHOULD CONTINUE AT A LOW LEVEL FOR THE NEXT THREE DAYS. THERE IS A SLIGHTLY INCREASED POSSIBILITY OF A LOW LEVEL M-CLASS EVENT DURING THAT TIME. IIA. GEOPHYSICAL ACTIVITY SUMMARY 23/2100Z TO 24/2100Z: THE GEOMAGNETIC FIELD WAS PREDOMINANTLY QUIET TO UNSETTLED. ISOLATED ACTIVE CONDITIONS OCCURRED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD SHOULD REMAIN PREDOMINANTLY QUIET TO UNSETTLED FOR THE NEXT THREE DAYS. ISOLATED ACTIVE PERIODS ARE POSSIBLE ON 25 AUGUST.
III. Event Probabilities 25 AUG to 27 AUG
Class M10%10%10%
Class X01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       24 AUG 131
  Predicted   25 AUG-27 AUG  128/128/130
  90 Day Mean        24 AUG 182
V. Geomagnetic A Indices
OBSERVED AFR/AP 23 AUG  005/011
ESTIMATED AFR/AP 24 AUG  010/012
PREDICTED AFR/AP 25 AUG-27 AUG  010/010-008/008-008/008
VI. Geomagnetic Activity Probabilities 25 AUG to 27 AUG
A. Middle Latitudes
Active25%15%15%
Minor storm10%05%05%
Major-severe storm05%01%05%
B. High Latitudes
Active25%20%15%
Minor storm10%05%05%
Major-severe storm05%01%01%

All times in UTC

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