Viewing archive of Sunday, 19 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 19 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 262 Issued at 2200Z on 19 Sep 2010IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z Solar activity was very low with only B-class activity
observed. Region 1106 (S20W34) and Region 1108 (S30E36) exhibited
little change during the period.
IB. Solar Activity Forecast
Solar activity is expected to be
predominately very low. A chance of C-class activity, with a slight
chance of M-class activity, is possible for the next three days (20
- 22 September).
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet for day one (20 September). Quiet to unsettled
levels, with isolated active periods, are expected on day two (21
September). Mostly unsettled, with isolated active to minor storm
levels, are expected on day three (22 September). The increase in
activity is due to a large, recurrent coronal hole high speed
stream.
III. Event Probabilities 20 Sep to 22 Sep
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 19 Sep 081 Predicted 20 Sep-22 Sep 082/082/083 90 Day Mean 19 Sep 079
V. Geomagnetic A Indices
Observed Afr/Ap 18 Sep 002/004 Estimated Afr/Ap 19 Sep 002/005 Predicted Afr/Ap 20 Sep-22 Sep 005/005-008/012-015/018
VI. Geomagnetic Activity Probabilities 20 Sep to 22 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 30% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 25% | 35% |
| Minor storm | 01% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
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