Viewing archive of Wednesday, 19 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 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 019 Issued at 2200Z on 19 JAN 2000IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z SOLAR ACTIVITY WAS LOW, ONLY MINOR C FLARES HAVE BEEN
OBSERVED. WITH THE EXCEPTION OF SOME MINOR GROWTH IN REGION 8837
(S09W41), ALL ACTIVE REGIONS APPEAR STABLE OR DECLINING. NO NEW
REGIONS WERE NUMBERED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. THERE IS A FAIR CHANCE FOR AN ISOLATED M CLASS EVENT
FROM REGION 8831 (S19W12) OR REGION 8824 (S13W58).
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
THE GEOMAGNETIC FIELD HAS BEEN BASICALLY QUIET AT ALL LATITUDES.
THERE WAS A SLIGHT ENHANCEMENT OF ENERGETIC PROTON FLUXES FOLLOWING
THE FLARE ACTIVITY ON 18 JANUARY, HOWEVER, FLUXES APPEAR TO BE
RETURNING TO BACKGROUND LEVELS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED UNTIL 21 JANUARY WHEN THE FIELD IS
EXPECTED TO BECOME MORE ACTIVE AS A RESULT OF THE M FLARE ACTIVITY
ON 18 JANUARY.
III. Event Probabilities 20 JAN to 22 JAN
| Class M | 50% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 10% | 10% | 10% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 19 JAN 179 Predicted 20 JAN-22 JAN 175/170/165 90 Day Mean 19 JAN 177
V. Geomagnetic A Indices
OBSERVED AFR/AP 18 JAN 003/004 ESTIMATED AFR/AP 19 JAN 003/005 PREDICTED AFR/AP 20 JAN-22 JAN 010/008-015/012-020/028
VI. Geomagnetic Activity Probabilities 20 JAN to 22 JAN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 25% | 30% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 25% | 30% |
| Minor storm | 05% | 10% | 15% |
| Major-severe storm | 01% | 01% | 05% |
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