Viewing archive of Thursday, 25 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 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 299 Issued at 2200Z on 25 Oct 2012IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity has been low. Region 1598 (S12E18)
produced a few low-level C-class events throughout the period, and
remains the most magnetically complex region on the disk. Although
Region 1598 continues to decay, a weak Delta magnetic configuration
was still observed in the regions trailer spots. Region 1596
(N07W21) is a moderately sized region with some magnetic complexity,
but did not produce any flares during the period. The other regions
on the disk were either stable or decaying.
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate with a chance for M-class events for the next three days
(26 - 28 Oct) with Region 1598 the most likely source.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field was quiet for the past 24 hours. Solar wind
speed, as measured at the ACE spacecraft, was predominately steady
around 350 km/s. The Bz component of the interplanetary magnetic
field ranged between +/- 4 nT. 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 quiet for the next three days (26 - 28 Oct).
III. Event Probabilities 26 Oct to 28 Oct
| Class M | 30% | 20% | 10% |
| Class X | 05% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Oct 130 Predicted 26 Oct-28 Oct 125/120/115 90 Day Mean 25 Oct 122
V. Geomagnetic A Indices
Observed Afr/Ap 24 Oct 003/004 Estimated Afr/Ap 25 Oct 003/004 Predicted Afr/Ap 26 Oct-28 Oct 006/005-006/005-006/005
VI. Geomagnetic Activity Probabilities 26 Oct to 28 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
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