:Product: 1208RSGA.txt :Issued: 2007 Dec 08 2203 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 2007 IA. Analysis of Solar Active Regions and Activity from 07/2100Z to 08/2100Z: Solar activity was very low. Region 978 (S10E39) has grown and new region 979 (N07W65) emerged. IB. Solar Activity Forecast: Solar activity is expected to range from very low to low. The development of Region 978 (S10E39 ) and emergence of Region 979 (N07W65) bring an increased possiblity of C-Class activity. IIA. Geophysical Activity Summary 07/2100Z to 08/2100Z: The geomagnetic field was quiet. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to remain at quiet levels for day 1 and 2, then increase to unsettled levels on day 3 as a recurrent coronal hole high speed stream becomes geoeffective. 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 087 Predicted 09 Dec-11 Dec 085/085/085 90 Day Mean 08 Dec 069 V. Geomagnetic A Indices Observed Afr/Ap 07 Dec 000/001 Estimated Afr/Ap 08 Dec 005/002 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 10/10/15 Minor storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 10/10/25 Minor storm 05/05/15 Major-severe storm 01/01/05