Viewing archive of Monday, 19 September 2011
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 2011 Sep 19 2200 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 2011IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z Solar activity was low. Region 1296 (N26W05) produced a
long duration C6 flare at 19/0737Z. Region 1301 (N20E63) produced a
C6/Sn flare at 19/1541Z. SOHO LASCO imagery observed 4 CME limb
events in the past 24 hours, none of which are expected to be
geoeffective. Region 1295 remains a beta gamma magnetic
configuration.
IB. Solar Activity Forecast
Solar activity is expected to be low
for the next three days (20-22 September). A chance for isolated
M-class flares exists from Region 1295.
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic field was mostly quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet for the next three days (20-22 September).
III. Event Probabilities 20 Sep to 22 Sep
| Class M | 40% | 40% | 40% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 19 Sep 141 Predicted 20 Sep-22 Sep 140/140/140 90 Day Mean 19 Sep 103
V. Geomagnetic A Indices
Observed Afr/Ap 18 Sep 005/005 Estimated Afr/Ap 19 Sep 005/005 Predicted Afr/Ap 20 Sep-22 Sep 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 20 Sep to 22 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 09% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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