Viewing archive of Tuesday, 3 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 03 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 277 Issued at 2200Z on 03 Oct 2000IA. Analysis of Solar Active Regions and Activity from 02-2100Z to 03-2100Z Solar activity was low. The largest event was a C4/Sf
at 02/2131Z from region 9182 (S02E63). Region 9177 (N28W68)
produced a C1/Sf flare at 03/0736Z with an associated type II radio
sweep (shock speed 400 km/s). A few small C-class flares punctuated
the remainder of the day. New regions 9183 (S31W32) and 9184
(S15E60) were numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate.
IIA. Geophysical Activity Summary 02-2100Z to 03-2100Z
The geomagnetic field ranged from unsettled to minor storm
conditions, with isolated major storm conditions at high latitudes.
Data from the ACE spacecraft showed the signature of a solar
transient beginning at approximately 03/00Z, although a clear shock
was not evident. The Boulder magnetometer registered a sudden
impulse of 11 nanoteslas at 03/0057Z. This transient is possibly
due to the C3/Sf flare observed at 01/1304Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to active with minor storming possible for the
first two days of the forecast period. Effects from a CME seen
yesterday are expected over the first two days. By day three the
field should be quiet to unsettled.
III. Event Probabilities 04 Oct to 06 Oct
| Class M | 50% | 50% | 50% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 03 Oct 192 Predicted 04 Oct-06 Oct 190/185/185 90 Day Mean 03 Oct 184
V. Geomagnetic A Indices
Observed Afr/Ap 02 Oct 006/011 Estimated Afr/Ap 03 Oct 025/035 Predicted Afr/Ap 04 Oct-06 Oct 015/015-020/020-010/012
VI. Geomagnetic Activity Probabilities 04 Oct to 06 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 15% |
| Minor storm | 15% | 15% | 05% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 20% | 20% | 10% |
| Major-severe storm | 10% | 10% | 05% |
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