Viewing archive of Thursday, 11 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 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 285 Issued at 2200Z on 11 Oct 2012IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z Solar activity was low. Region 1589 (N12E49) was
responsible for the largest flare of the period; a C4 x-ray flare at
11/0804Z. Region 1589 is currently the most complex region with a
Beta-Gamma magnetic classification. New Region 1590 (S29E59)
rotated onto the southeast limb and was numbered today. No
Earth-directed coronal mass ejections were observed.
IB. Solar Activity Forecast
Solar activity is expected to be low
with a chance for isolated M-class activity for the forecast period
(12-14 October).
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
The geomagnetic field was quiet. Solar wind speed, measured at the
ACE spacecraft, was slightly elevated between approximately 440 to
500 km/s while the Bz component of the interplanetary magnetic field
did not vary much beyond +/- 4 nT. The greater than 2 MeV electron
flux at geosynchronous orbit was at high levels throughout the
period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mostly quiet on days 1-2 (12-13 October). On day 3
(14 October) a coronal hole high speed stream is expected to move
into geoeffective position causing quiet to unsettled conditions
with a chance for active periods.
III. Event Probabilities 12 Oct to 14 Oct
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 11 Oct 117 Predicted 12 Oct-14 Oct 115/115/120 90 Day Mean 11 Oct 118
V. Geomagnetic A Indices
Observed Afr/Ap 10 Oct 006/009 Estimated Afr/Ap 11 Oct 005/006 Predicted Afr/Ap 12 Oct-14 Oct 006/005-006/005-009/012
VI. Geomagnetic Activity Probabilities 12 Oct to 14 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 25% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 15% | 15% | 30% |
| Major-severe storm | 05% | 05% | 30% |
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