Viewing archive of Thursday, 3 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 03 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 034 Issued at 2200Z on 03 FEB 2000IA. Analysis of Solar Active Regions and Activity from 02-2100Z to 03-2100Z SOLAR ACTIVITY INCREASED, BUT REMAINED IN THE LOW
CATEGORY. SEVERAL C-CLASS X-RAY FLARES OCCURRED, MOST OF WHICH WERE
NOT OPTICALLY CORRELATED. REGIONS 8848 (S08W29) AND 8854 (S34E59)
EACH PRODUCED A SINGLE SUBFLARE. NO SIGNIFICANT CHANGES WERE
OBSERVED IN ANY OF THE VISIBLE REGIONS. NEW REGIONS 8857 (S20E04)
AND 8858 (N23E73) WERE NUMBERED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
AT MOSTLY LOW LEVELS. HOWEVER, AN INCREASING TREND IS EXPECTED TO
BEGIN ON 05 FEBRUARY WITH THE RETURN OF PREVIOUSLY ACTIVE
LONGITUDES.
IIA. Geophysical Activity Summary 02-2100Z to 03-2100Z
GEOMAGNETIC FIELD ACTIVITY REMAINED AT QUIET TO UNSETTLED LEVELS. THE
GREATER THAN 2 MEV ELECTRON FLUX AT GEOSYNCHRONOUS ORBIT WAS AT
MODERATE TO HIGH LEVELS.
IIB. Geophysical Activity Forecast
GEOMAGNETIC FIELD ACTIVITY IS
EXPECTED TO BE AT QUIET TO UNSETTLED LEVELS DURING THE FIRST TWO
DAYS OF THE PERIOD. UNSETTLED TO ACTIVE CONDITIONS WILL BE POSSIBLE
BEGINNING 06 FEBRUARY DUE TO CORONAL HOLE EFFECTS. THE GREATER THAN
2 MEV ELECTRON FLUX AT GEOSYNCHRONOUS ORBIT IS EXPECTED TO DECREASE
TO NORMAL TO MODERATE LEVELS EARLY IN THE PERIOD.
III. Event Probabilities 04 FEB to 06 FEB
| Class M | 10% | 20% | 25% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 03 FEB 154 Predicted 04 FEB-06 FEB 155/170/180 90 Day Mean 03 FEB 173
V. Geomagnetic A Indices
OBSERVED AFR/AP 02 FEB 009/007 ESTIMATED AFR/AP 03 FEB 007/010 PREDICTED AFR/AP 04 FEB-06 FEB 005/007-007/007-010/010
VI. Geomagnetic Activity Probabilities 04 FEB to 06 FEB
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 20% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 25% |
| Minor storm | 10% | 10% | 15% |
| Major-severe storm | 01% | 01% | 01% |
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