:Product: 1208RSGA.txt :Issued: 2011 Dec 08 2200 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 342 Issued at 2200Z on 08 Dec 2011 IA. Analysis of Solar Active Regions and Activity from 07/2100Z to 08/2100Z: Solar activity was low. A few low level C-class flares occurred early in the period from a region not yet around the east limb. IB. Solar Activity Forecast: Solar activity is expected to be very low to low for the next 3 days (9-11 December). IIA. Geophysical Activity Summary 07/2100Z to 08/2100Z: The geomagnetic field was quiet. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet for days 1-2 (9-10 December) before increasing to unsettled and active conditions on day 3 (11 December) due to a coronal hole high speed stream. III. Event Probabilities 09 Dec-11 Dec Class M 10/10/10 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 08 Dec 145 Predicted 09 Dec-11 Dec 145/145/145 90 Day Mean 08 Dec 146 V. Geomagnetic A Indices Observed Afr/Ap 07 Dec 001/001 Estimated Afr/Ap 08 Dec 005/005 Predicted Afr/Ap 09 Dec-11 Dec 005/005-005/005-008/008 VI. Geomagnetic Activity Probabilities 09 Dec-11 Dec A. Middle Latitudes Active 10/10/40 Minor storm 05/05/15 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/50 Minor storm 01/01/25 Major-severe storm 01/01/01