Viewing archive of Saturday, 10 November 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 Nov 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 315 Issued at 2200Z on 10 Nov 2012IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z
Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C2 event observed at
10/0504Z from Region 1608 (S20W03) which was also associated with a
coronal mass ejection (CME). An additional CME was observed off the west
limb at 10/1448Z but was from a region on the backside and is not
earthward directed. A new unnumbered spot region is rotating onto the
disk from east limb at about S21. There are currently 5 numbered sunspot
regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a slight chance for an M-class event on days one, two, and three (11
Nov, 12 Nov, 13 Nov).
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed,
as measured by the ACE spacecraft, reached a peak speed of 337 km/s at
09/2104Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be quiet with a slight chance of unsettled levels on day one (11
Nov). The CMEs from 09/1524Z and 10/0539Z are expected to merge and
arrive on 12 Nov around 1200Z which will increase geomagnetic activity
to active levels with a chance for minor storm periods on days two and
three (12 Nov, 13 Nov).
III. Event Probabilities 11 Nov to 13 Nov
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 10 Nov 122 Predicted 11 Nov-13 Nov 130/135/140 90 Day Mean 10 Nov 117
V. Geomagnetic A Indices
Observed Afr/Ap 09 Nov 001/002 Estimated Afr/Ap 10 Nov 002/002 Predicted Afr/Ap 11 Nov-13 Nov 007/007-017/030-013/015
VI. Geomagnetic Activity Probabilities 11 Nov to 13 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 35% | 35% |
| Minor storm | 01% | 20% | 25% |
| Major-severe storm | 01% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 30% |
| Minor storm | 15% | 25% | 25% |
| Major-severe storm | 05% | 55% | 05% |
All times in UTC
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