Viewing archive of Thursday, 9 September 2010
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 2010 Sep 09 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 252 Issued at 2200Z on 09 Sep 2010IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z Solar activity has been low. Region 1105 (N19W90)
produced a long duration C3 x-ray event at 08/2333Z with an
associated west limb CME. Observations from the SOHO/LASCO C2 and C3
imagery indicates the CME is not earth directed.
IB. Solar Activity Forecast
Solar activity is expected to be very
low for the next three days (10-12 September).
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
The geomagnetic field has been quiet to unsettled. Solar wind
velocities, as measured at the ACE spacecraft, indicated a solar
wind speed enhancement to around 450 km/s during the period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be predominately quiet on days one and two (10-11
September). Quiet to unsettled conditions, with a slight chance for
an isolated active period, is expected for day three (12 September),
as a recurrent coronal hole high speed stream becomes geoeffective.
III. Event Probabilities 10 Sep to 12 Sep
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 09 Sep 074 Predicted 10 Sep-12 Sep 074/075/075 90 Day Mean 09 Sep 078
V. Geomagnetic A Indices
Observed Afr/Ap 08 Sep 008/010 Estimated Afr/Ap 09 Sep 006/007 Predicted Afr/Ap 10 Sep-12 Sep 005/005-005/005-008/010
VI. Geomagnetic Activity Probabilities 10 Sep to 12 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 25% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
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