Viewing archive of Thursday, 31 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 31 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 244 Issued at 2200Z on 31 AUG 2000IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 31-2100Z SOLAR ACTIVITY WAS LOW. REGION 9143 (S18W20) PRODUCED
TODAY'S LARGEST EVENT, A C1/SF AT 0656Z. THIS GROUP HAS SHOWN SLIGHT
DECAY DURING THE PAST 24 HOURS. REGION 9149 (N12E32) CONTINUES TO BE
THE LARGEST GROUP ON THE DISK BUT WAS STABLE AND QUIET. NEW REGIONS
9150 (N11E51), 9151 (N05E42), AND 9152 (N17E75) ARE SMALL, STABLE
GROUPS THAT WERE ASSIGNED DURING THE PAST 24 HOURS.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE
PREDOMINANTLY LOW. THERE IS A SLIGHT-TO-FAIR CHANCE FOR AN ISOLATED
M-CLASS EVENT DURING THE NEXT THREE DAYS.
IIA. GEOPHYSICAL ACTIVITY SUMMARY 30/2100Z TO 31/2100Z:
THE GEOMAGNETIC FIELD WAS UNSETTLED TO ACTIVE. SOLAR WIND
OBSERVATIONS INDICATE THE CONTINUED INFLUENCE OF A HIGH-SPEED
CORONAL HOLE STREAM. THE GREATER THAN 2 MEV ELECTRON FLUX AT GEOSYNCHRONOUS
ORBIT EXCEEDED HIGH LEVELS DURING THE PAST 24 HOURS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE UNSETTLED WITH A CHANCE FOR ISOLATED ACTIVE PERIODS
DURING THE NEXT 24 HOURS AS EFFECTS FROM THE CORONAL HOLE STREAM ARE
EXPECTED TO CONTINUE. PREDOMINANTLY UNSETTLED LEVELS ARE EXPECTED FOR
THE SECOND AND THIRD DAYS.
III. Event Probabilities 01 SEP to 03 SEP
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 31 AUG 163 Predicted 01 SEP-03 SEP 165/163/161 90 Day Mean 31 AUG 181
V. Geomagnetic A Indices
OBSERVED AFR/AP 30 AUG 012/013 ESTIMATED AFR/AP 31 AUG 015/016 PREDICTED AFR/AP 01 SEP-03 SEP 015/015-012/012-010/010
VI. Geomagnetic Activity Probabilities 01 SEP to 03 SEP
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 25% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 25% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 10% | 10% | 05% |
All times in UTC
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