:Product: 0913RSGA.txt :Issued: 2010 Sep 13 2201 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 256 Issued at 2200Z on 13 Sep 2010 IA. Analysis of Solar Active Regions and Activity from 12/2100Z to 13/2100Z: Solar activity was very low. The disk was quiet and stable. IB. Solar Activity Forecast: Solar activity is expected to remain at very low levels. A slight chance for C-class activity is possible from Region 1106 (S19E44) for the next three days (14 - 16 September). IIA. Geophysical Activity Summary 12/2100Z to 13/2100Z: The geomagnetic field was quiet. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels for days one and two (14 - 15 September). Quiet to unsettled conditions, with isolated high latitude active periods, are possible on day three (16 September) due to the combined effects from the 11 September CME and a weak coronal hole high speed stream. III. Event Probabilities 14 Sep-16 Sep Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 13 Sep 080 Predicted 14 Sep-16 Sep 080/080/081 90 Day Mean 13 Sep 078 V. Geomagnetic A Indices Observed Afr/Ap 12 Sep 001/001 Estimated Afr/Ap 13 Sep 002/003 Predicted Afr/Ap 14 Sep-16 Sep 005/005-005/005-008/008 VI. Geomagnetic Activity Probabilities 14 Sep-16 Sep A. Middle Latitudes Active 05/10/25 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 10/15/30 Minor storm 01/01/01 Major-severe storm 01/01/01