Viewing archive of Tuesday, 18 January 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 Jan 18 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 018 Issued at 2200Z on 18 JAN 2000IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z SOLAR ACTIVITY WAS MODERATE. REGION 8831 (S18E01)
PRODUCED A LONG DURATION M3/1N X-RAY EVENT AT 18/1727Z WITH AN
ASSOCIATED TYPE II SWEEP AND AN ESTIMATED SPEED OF 400 KM/S. REGION
8824 PRODUCED AN M1/SF AT 18/1008Z. REGION 8837 (S08W27) RAPIDLY
DEVELOPED DURING THE PERIOD AND IS CURRENTLY A DSO BETA SUNSPOT
GROUP WITH APPROXIMATELY 9 SPOTS. NEW REGIONS 8837 (S08W27) AND
8838 (N12E67) WERE NUMBERED TODAY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. REGIONS 8824 AND 8831 HAVE THE BEST POTENTIAL TO
PRODUCE AN ISOLATED M-CLASS EVENT.
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
THE GEOMAGNETIC FIELD WAS QUIET. AN ISOLATED PERIOD OF UNSETTLED
CONDITIONS WAS OBSERVED IN THE HIGHER LATITUDES FROM 18/1500 -
1800Z..
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET DURING THE FIRST PART OF THE PERIOD THEN BECOME
QUIET TO UNSETTLED. THERE IS A POSSIBILITY OF A SOLAR PROTON EVENT
AT GEOSYNCHRONOUS ORBIT DUE TO THE CHARACTERISTICS OF THE M3 X-RAY
EVENT MENTIONED ABOVE.
III. Event Probabilities 19 JAN to 21 JAN
| Class M | 50% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 10% | 01% | 01% |
| PCAF | YELLOW | ||
IV. Penticton 10.7 cm Flux
Observed 18 JAN 195 Predicted 19 JAN-21 JAN 190/185/180 90 Day Mean 18 JAN 177
V. Geomagnetic A Indices
OBSERVED AFR/AP 17 JAN 004/003 ESTIMATED AFR/AP 18 JAN 005/003 PREDICTED AFR/AP 19 JAN-21 JAN 005/005-010/010-010/010
VI. Geomagnetic Activity Probabilities 19 JAN to 21 JAN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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