Viewing archive of Friday, 24 March 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 Mar 24 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 084 Issued at 2200Z on 24 MAR 2000IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z SOLAR ACTIVITY WAS HIGH. REGION 8910 (N16W82) PRODUCED
AN X1/2B EVENT AT 24/0752UT. THE ACTIVITY INCLUDED TYPES II AND IV
SWEEPS AND A BURST OF 570 SFU AT 10 CM. TWO M-CLASS EVENTS ALSO
OCCURRED DURING THE PERIOD: AN M2/SF AT 24/1129UT FROM NEWLY
NUMBERED REGION 8928 (N21E67) AND AN OPTICALLY UNCORRELATED M2 EVENT
AT 24/1522UT. THIRTEEN SPOTTED REGIONS ARE CURRENTLY ON THE DISK.
REGIONS 8917 (N20W61), 8921 (S17E23), 8925 (S17E63), 8926 (S10W31),
AND 8927 (N17W14) WERE ALSO ACTIVE DURING THE PERIOD, ALL PRODUCING
ISOLATED OPTICAL SUBFLARES. REGION 8921 INCREASED IN SIZE BY 25
PERCENT AND NEARLY DOUBLED ITS NUMBER OF SPOTS (FROM 17 TO 26)
DURING THE PERIOD.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE
MODERATE WITH A CHANCE OF ISOLATED X-CLASS EVENTS.
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
THE GEOMAGNETIC FIELD WAS MOSTLY QUIET TO UNSETTLED, WITH A SINGLE
ACTIVE PERIOD OCCURRING AT 24/12-1500UT. THE SOLAR WIND SPEED
INCREASED FROM 550 TO 700 KM/S DURING THE DAY, PRESUMABLY RELATED TO
A WELL-POSITIONED CORONAL HOLE AND THE RESULTING HIGH-SPEED STREAM.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED WITH POSSIBLE ISOLATED ACTIVE
PERIODS DURING THE FIRST TWO DAYS OF THE PERIOD.
III. Event Probabilities 25 MAR to 27 MAR
| Class M | 75% | 75% | 75% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | YELLOW | ||
IV. Penticton 10.7 cm Flux
Observed 24 MAR 219 Predicted 25 MAR-27 MAR 220/225/230 90 Day Mean 24 MAR 176
V. Geomagnetic A Indices
OBSERVED AFR/AP 23 MAR 008/011 ESTIMATED AFR/AP 24 MAR 015/015 PREDICTED AFR/AP 25 MAR-27 MAR 015/020-015/015-010/010
VI. Geomagnetic Activity Probabilities 25 MAR to 27 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 50% | 50% | 30% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 60% | 60% | 40% |
| Minor storm | 20% | 20% | 10% |
| Major-severe storm | 01% | 01% | 01% |
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