Viewing archive of Saturday, 21 October 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 Oct 21 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 295 Issued at 2200Z on 21 Oct 2000IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z Solar activity was moderate. Region 9201 (N16E19)
produced an M3/1N flare at 21/1831 UTC. This region also produced a
few low level C-class flares. Region 9199 (N10W17) also generated
C-class activity, the largest flare being a C5/SF at 21/0956 UTC.
Neither of these regions appear particularly large or complex.
IB. Solar Activity Forecast
Solar activity is expected to be low
although another small M-class flare is possible in Region 9199 or
Region 9201.
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be predominately quiet to unsettled. Activity levels may
increase over the next day, including isolated active periods, due
to a recurrent coronal hole stream.
III. Event Probabilities 22 Oct to 24 Oct
| Class M | 20% | 20% | 20% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 21 Oct 158 Predicted 22 Oct-24 Oct 160/165/170 90 Day Mean 21 Oct 170
V. Geomagnetic A Indices
Observed Afr/Ap 20 Oct 002/004 Estimated Afr/Ap 21 Oct 005/005 Predicted Afr/Ap 22 Oct-24 Oct 010/015-015/020-010/010
VI. Geomagnetic Activity Probabilities 22 Oct to 24 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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