Viewing archive of Wednesday, 31 October 2012
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 2012 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 2012IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 31-2100Z Solar activity was low. Regions 1596 (N06, L=152) and
1598 (S11W65) both produced C1 flares at 31/0507Z and 31/1139Z
respectively. No Earth-directed coronal mass ejections (CMEs) were
observed during the reporting period.
IB. Solar Activity Forecast
Solar activity is expected to be very
low with a chance for C-flare activity.
IIA. Geophysical Activity Summary 30-2100Z to 31-2100Z
The geomagnetic field was at quiet to unsettled levels. A sudden
impulse of 13 nT was observed at the Boulder magnetometer at
31/1539Z due to the arrival of a CME. The greater than 2 MeV
electron flux at geosynchronous orbit reached high levels during the
period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be unsettled to active with a chance for minor storm
levels on day one (01 November) due to continued CME effects. Quiet
to unsettled levels with a slight chance for active conditions are
expected on days 2 and 3 (02 - 03 November) as effects subside.
III. Event Probabilities 01 Nov to 03 Nov
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 31 Oct 104 Predicted 01 Nov-03 Nov 105/100/095 90 Day Mean 31 Oct 120
V. Geomagnetic A Indices
Observed Afr/Ap 30 Oct 001/002 Estimated Afr/Ap 31 Oct 003/006 Predicted Afr/Ap 01 Nov-03 Nov 014/020-007/010-007/008
VI. Geomagnetic Activity Probabilities 01 Nov to 03 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 45% | 20% | 15% |
| Minor storm | 15% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 30% | 25% | 20% |
| Major-severe storm | 60% | 25% | 20% |
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