:Product: 0910RSGA.txt :Issued: 2010 Sep 10 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 253 Issued at 2200Z on 10 Sep 2010 IA. Analysis of Solar Active Regions and Activity from 09/2100Z to 10/2100Z: Solar activity was very low. The visible disk was spotless. An area of enhanced plage and surging was observed on the east limb near S20. IB. Solar Activity Forecast: Solar activity is expected to remain at very low levels. IIA. Geophysical Activity Summary 09/2100Z to 10/2100Z: The geomagnetic field was quiet. IIB. Geophysical Activity Forecast: Solar activity is expected to be at predominately quiet to unsettled levels for the next three days (11 - 13 September) due to a sequence of small, recurrent coronal holes that are forecasted to become geoeffective. Isolated active periods are possible on 12 - 13 September. III. Event Probabilities 11 Sep-13 Sep Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 10 Sep 076 Predicted 11 Sep-13 Sep 076/077/078 90 Day Mean 10 Sep 078 V. Geomagnetic A Indices Observed Afr/Ap 09 Sep 004/004 Estimated Afr/Ap 10 Sep 004/004 Predicted Afr/Ap 11 Sep-13 Sep 006/007-008/008-008/008 VI. Geomagnetic Activity Probabilities 11 Sep-13 Sep A. Middle Latitudes Active 15/25/25 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 20/30/30 Minor storm 01/01/01 Major-severe storm 01/01/01