Viewing archive of Saturday, 14 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 14 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 288 Issued at 2200Z on 14 Oct 2000IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z Solar activity has been moderate. Region 9182 (N04W90)
produced an M1/Sf flare at 14/0840 UTC, as well as several C-class
subfaint flares. Region 9194 (S12E36) exhibited some increased
activity today, also producing several C-class subfaint flares.
Single flares of similar magnitude were noted from a few other
regions, including newly numbered Region 9198 (S30E65).
IB. Solar Activity Forecast
Solar activity is expected to become
predominantly low, with the departure of Region 9182 behind the
western limb. A chance of isolated moderate-level activity remains
for regions 9194, 9193 (N05W46), and for new regions expected
on the eastern limb.
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
The geomagnetic field varied from unsettled to major storm levels,
due to a prolonged period of negative Bz accompanied by moderate
solar wind speed. Greatest activity occurred during 14/0900-1800
UTC, which saw two periods of storming at minor levels in middle
latitudes, and at major levels in higher latitudes. Possible sources
of this activity include extended effects of the 09 October CME
passage, which commenced yesterday, or trailing effects from a weaker
LDE C-flare that occurred about 30 hours after the CME.
IIB. Geophysical Activity Forecast
Geomagnetic activity is
expected to ease to unsettled levels, with isolated active periods.
The current geomagnetic disturbance is expected to end during day
one, and an onset of high speed stream effects from a coronal hole
is expected to emerge thereafter, persisting through day two and
tapering off during day three. Isolated minor storming at higher
latitudes is possible during this period.
III. Event Probabilities 15 Oct to 17 Oct
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 14 Oct 163 Predicted 15 Oct-17 Oct 175/185/195 90 Day Mean 14 Oct 177
V. Geomagnetic A Indices
Observed Afr/Ap 13 Oct 022/027 Estimated Afr/Ap 14 Oct 028/040 Predicted Afr/Ap 15 Oct-17 Oct 018/020-015/015-015/015
VI. Geomagnetic Activity Probabilities 15 Oct to 17 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 25% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 30% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 05% | 05% | 01% |
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