Viewing archive of Friday, 31 August 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 Aug 31 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 244 Issued at 2200Z on 31 Aug 2012IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 31-2100Z Solar activity was low. Regions 1560 (N04E09), 1563
(S24E58) and newly numbered 1564 (S13E70) each produced low-level C
flares during the period. Region 1564 rotated around the east limb
overnight and is considered a Dao-beta spot group. Region 1560 grew
in areal coverage and became more magnetically complex with a
beta-gamma magnetic configuration. A C8 flare associated with a
large filament eruption near S06E20 occurred at 31/2043Z associated
with Type II (estimated speed 515 km/s) and Type IV radio sweeps. A
CME first became visible on SDO/AIA 304 imagery at approximately
1945Z. Further evaluation will be conducted as SOHO LASCO imagery
becomes available.
IB. Solar Activity Forecast
Solar activity is expected to be low
with a chance for moderate activity throughout the forecast period
(01-03 September).
IIA. Geophysical Activity Summary 30-2100Z to 31-2100Z
The geomagnetic field was quiet. 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 remain quiet for the next three days (01-03 September).
III. Event Probabilities 01 Sep to 03 Sep
| Class M | 40% | 40% | 40% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 31 Aug 131 Predicted 01 Sep-03 Sep 130/130/130 90 Day Mean 31 Aug 124
V. Geomagnetic A Indices
Observed Afr/Ap 30 Aug 004/003 Estimated Afr/Ap 31 Aug 002/003 Predicted Afr/Ap 01 Sep-03 Sep 006/005-006/005-006/005
VI. Geomagnetic Activity Probabilities 01 Sep to 03 Sep
| 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% | 15% | 15% |
| Major-severe storm | 05% | 05% | 05% |
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