Viewing archive of Tuesday, 31 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 31 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 305 Issued at 2200Z on 31 Oct 2000IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 31-2100Z Solar activity remained at low levels. Region 9209
(S22W06) produced isolated C-class flares, the largest of which was
a C6/1f at 31/0300 UTC. The visible regions were largely stable. No
new regions were numbered.
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate. Regions 9209 and 9212 (N10E34) appear capable of
producing an isolated M-class flare.
IIA. Geophysical Activity Summary 30-2100Z to 31-2100Z
Geomagnetic field activity was at quiet to unsettled levels through
31/1700 UTC, then increased to unsettled to active levels following
a sudden impulse at 31/1715 UTC (8 nT, as measured by the Boulder
USGS magnetometer). The greater than 10 MeV proton flux at
geosynchronous orbit became enhanced beginning at approximately
31/1200 UTC, but did not reach event criteria. The greater than 2
MeV electron flux at geosynchronous orbit briefly reached high
levels late in the period.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to be at quiet to active levels during day one. Quiet to
unsettled levels are expected for the rest of the period. The
greater than 2 MeV electron flux is not expected to reach high
levels during the forecast period.
III. Event Probabilities 01 Nov to 03 Nov
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 31 Oct 193 Predicted 01 Nov-03 Nov 190/190/185 90 Day Mean 31 Oct 171
V. Geomagnetic A Indices
Observed Afr/Ap 30 Oct 013/013 Estimated Afr/Ap 31 Oct 015/016 Predicted Afr/Ap 01 Nov-03 Nov 015/018-010/015-007/010
VI. Geomagnetic Activity Probabilities 01 Nov to 03 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 25% | 15% |
| Minor storm | 15% | 10% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 25% | 20% |
| Minor storm | 20% | 15% | 05% |
| Major-severe storm | 10% | 01% | 01% |
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