Viewing archive of Monday, 25 September 2006
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 2006 Sep 25 2204 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 268 Issued at 2200Z on 25 Sep 2006IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity was very low. Region 910 (S08W46) has
decayed to a plage region with no spots visible in white light
imagery. Updated LASCO imagery shows a CME originating from behind
the NE limb on 23 Sep. A slow CME was also observed from Region 910
on 24 Sep. Neither event is expected to be geoeffective.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field has been quiet to unsettled. Solar wind speed
remains elevated (currently 525 km/s) due to a coronal hole high
speed stream. The speed has, however, been steadily decreasing the
past 24 hours as the coronal hole rotates into a less geoeffective
position. The greater than 2 MeV electron flux reached high levels
today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled for the forecast period (26 - 28
Sep).
III. Event Probabilities 26 Sep to 28 Sep
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Sep 070 Predicted 26 Sep-28 Sep 070/080/075 90 Day Mean 25 Sep 077
V. Geomagnetic A Indices
Observed Afr/Ap 24 Sep 015/023 Estimated Afr/Ap 25 Sep 006/008 Predicted Afr/Ap 26 Sep-28 Sep 005/008-006/008-008/012
VI. Geomagnetic Activity Probabilities 26 Sep to 28 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 05% | 05% | 05% |
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