Viewing archive of Friday, 26 September 2008
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 2008 Sep 26 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 270 Issued at 2200Z on 26 Sep 2008IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z Solar activity was at very low levels. The visible
solar disk was spotless as Region 1002 (N26W79) decayed to plage.
IB. Solar Activity Forecast
Solar activity is expected to remain
at very low levels.
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic field was at quiet levels.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet levels for all three days (27 to 29
September). There is a slight chance for isolated unsettled periods
on day three, as a recurrent solar wind stream rotates into a
geoeffective position.
III. Event Probabilities 27 Sep to 29 Sep
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 26 Sep 068 Predicted 27 Sep-29 Sep 066/066/066 90 Day Mean 26 Sep 066
V. Geomagnetic A Indices
Observed Afr/Ap 25 Sep 001/004 Estimated Afr/Ap 26 Sep 003/005 Predicted Afr/Ap 27 Sep-29 Sep 005/005-005/005-008/008
VI. Geomagnetic Activity Probabilities 27 Sep to 29 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 01% | 01% | 10% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 01% | 01% | 15% |
| Minor storm | 01% | 01% | 10% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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