Viewing archive of Monday, 21 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 21 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 234 Issued at 2200Z on 21 AUG 2000IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z
SOLAR ACTIVITY WAS LOW. SEVERAL MINOR C-CLASS EVENTS
OCCURRED DURING THE PERIOD. THE LARGEST EVENT WAS A C4/1F AT
21/0538Z FROM REGION 9125. MODERATE GROWTH CONTINUED IN REGION
9139. NO NEW REGIONS WERE NUMBERED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
AT LOW LEVELS WITH THE CHANCE OF AN ISOLATED MINOR M-CLASS EVENT
POSSIBLE.
IIA. GEOPHYSICAL ACTIVITY SUMMARY 20/2100Z TO 21/2100Z:
THE GEOMAGNETIC FIELD WAS MOSTLY QUIET TO UNSETTLED WITH ONE ISOLATED
PERIOD OF ACTIVE CONDITIONS OBSERVED FROM 21/0900Z - 21/1200Z.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 22 AUG to 24 AUG
| Class M | 25% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 21 AUG 151 Predicted 22 AUG-24 AUG 145/135/130 90 Day Mean 21 AUG 183
V. Geomagnetic A Indices
OBSERVED AFR/AP 20 AUG 003/007 ESTIMATED AFR/AP 21 AUG 008/010 PREDICTED AFR/AP 22 AUG-24 AUG 010/010-010/015-010/012
VI. Geomagnetic Activity Probabilities 22 AUG to 24 AUG
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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