Viewing archive of Friday, 26 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 26 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 300 Issued at 2200Z on 26 Oct 2012IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z Solar activity has been low. Region 1598 (S12E04), a
Dko/Beta-Delta spot group, remained the most magnetically complex
region, yet only produced a C1/Sf flare at 26/1607Z. The most
active region was an area of enhanced plage near S27W87, formerly
Region 1594, where three low-level C-class flares originated.
Region 1596 (N08W35) showed signs of umbral separation, and new
Region 1600 (N09W14) was numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be low
with a slight chance for M-class flares for the next three days
(27-29 October).
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic field has been quiet for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, remained relatively
steady at 350 km/s. The Bz component of the interplanetary magnetic
field remained mostly positive, with minor deflections of +/-4 nT,
while the total field held steady at 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 (27-29 October).
III. Event Probabilities 27 Oct to 29 Oct
| Class M | 20% | 15% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 26 Oct 131 Predicted 27 Oct-29 Oct 135/130/115 90 Day Mean 26 Oct 122
V. Geomagnetic A Indices
Observed Afr/Ap 25 Oct 003/004 Estimated Afr/Ap 26 Oct 003/005 Predicted Afr/Ap 27 Oct-29 Oct 006/005-006/005-006/005
VI. Geomagnetic Activity Probabilities 27 Oct to 29 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% |
All times in UTC
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