Viewing archive of Thursday, 10 November 2011
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 2011 Nov 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 314 Issued at 2200Z on 10 Nov 2011IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z Solar activity was low. Occasional C-class flares were
observed. Region 1339 (N19W33) produced the largest flare of the
day, a C6/1f at 10/1831Z. Region 1339 showed gradual intermediate
and trailer spot decay during the period and was classified as an
Fkc/beta-gamma. Minor spot growth was noted in Regions 1341
(N08E14), 1344 (S19W31), and 1345 (S25W16). No new regions were
numbered.
IB. Solar Activity Forecast
Solar activity is expected to be low
during the period (11 - 13 November) with a chance for an M-class
flare from Region 1339. There will also be a slight chance for a
major flare (M5 or above) from Region 1339 during the period.
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to unsettled levels on day 1 (11 November).
Activity is expected to increase to unsettled to minor storm levels
on day 2 (12 November) due to a CME arrival, associated with a halo
CME observed on 09 November. Activity is expected to decrease to
unsettled to active levels on day 3 (13 November) as CME effects
gradually subside.
III. Event Probabilities 11 Nov to 13 Nov
| Class M | 50% | 50% | 50% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 10 Nov 179 Predicted 11 Nov-13 Nov 180/175/175 90 Day Mean 10 Nov 132
V. Geomagnetic A Indices
Observed Afr/Ap 09 Nov 002/002 Estimated Afr/Ap 10 Nov 003/003 Predicted Afr/Ap 11 Nov-13 Nov 010/010-020/020-015/015
VI. Geomagnetic Activity Probabilities 11 Nov to 13 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 25% | 15% |
| Minor storm | 01% | 20% | 10% |
| Major-severe storm | 01% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 30% | 20% |
| Minor storm | 01% | 25% | 15% |
| Major-severe storm | 01% | 10% | 01% |
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