Viewing archive of Friday, 4 February 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 Feb 04 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 035 Issued at 2200Z on 04 FEB 2000IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z SOLAR ACTIVITY WAS MODERATE. AN M3/SF OCCURRED AT
04/0919Z IN REGION 8858 (N26E64). FREQUENT C-CLASS EVENTS OCCURRED
THROUGHOUT THE PERIOD WITH THE MAJORITY ORIGINATING IN REGION 8858.
AN IMPRESSIVE C7/1F FLARE AND ASSOCIATED CORONAL MASS EJECTION WERE
ALSO OBSERVED FROM THIS REGION AT 04/1950Z. NEW REGION 8860 (N26E06)
WAS NUMBERED TODAY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO CONTINUE
AT LOW TO MODERATE LEVELS. REGION 8858 WILL LIKELY CONTINUE
PRODUCING C-CLASS ACTIVITY WITH ISOLATED M-CLASS EVENTS POSSIBLE.
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
THE GEOMAGNETIC FIELD WAS QUIET. THE GREATER THAN 2 MEV ELECTRON FLUX
AT GEOSYNCHRONOUS ORBIT WAS AT MODERATE TO HIGH LEVELS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE LOW TO UNSETTLED THROUGH DAY ONE. OCCASIONAL ACTIVE
PERIODS ARE EXPECTED THROUGH DAYS TWO AND THREE DUE TO A FAVORABLY
POSITIONED CORONAL HOLE.
III. Event Probabilities 05 FEB to 07 FEB
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 04 FEB 167 Predicted 05 FEB-07 FEB 170/175/180 90 Day Mean 04 FEB 174
V. Geomagnetic A Indices
OBSERVED AFR/AP 03 FEB 007/008 ESTIMATED AFR/AP 04 FEB 005/007 PREDICTED AFR/AP 05 FEB-07 FEB 007/010-012/015-012/010
VI. Geomagnetic Activity Probabilities 05 FEB to 07 FEB
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 25% | 25% |
| Minor storm | 01% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 30% | 30% |
| Minor storm | 01% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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