Viewing archive of Saturday, 30 December 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 Dec 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 365 Issued at 2200Z on 30 Dec 2000IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity was low. The largest event this period
was a C5/Sf flare that occurred in Region 9283 (S11W28) at 30/1039Z.
This region has been in slow decay over the past 2-3 days, but
continues to produce occasional C-class flares. The largest active
region on the visible disk is Region 9289 (S07E30) which has now
developed into an EKI beta-gamma group nearing 900 millionths of
white light area. Frequent brightenings were observed and occasional
low C-class flares occurred, but magnetic complexity appears
moderate at best. New region 9292 (N25E63) was numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate. Large Region 9289 will continue to produce C-class
activity with a good chance of an isolated M-class flare.
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to continue at quiet levels.
III. Event Probabilities 31 Dec to 02 Jan
| Class M | 50% | 50% | 50% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Dec 182 Predicted 31 Dec-02 Jan 185/175/170 90 Day Mean 30 Dec 173
V. Geomagnetic A Indices
Observed Afr/Ap 29 Dec 006/006 Estimated Afr/Ap 30 Dec 005/006 Predicted Afr/Ap 31 Dec-02 Jan 005/010-005/010-005/010
VI. Geomagnetic Activity Probabilities 31 Dec to 02 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 20% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
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