:Product: 1209RSGA.txt :Issued: 2007 Dec 09 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 343 Issued at 2200Z on 09 Dec 2007 IA. Analysis of Solar Active Regions and Activity from 08/2100Z to 09/2100Z: Solar activity was very low. Region 978 (S09E26) produced a B9.4 flare during this perioed. IB. Solar Activity Forecast: Solar activity is expected to range from very low to low. C-class activity is likely from region 978. IIA. Geophysical Activity Summary 08/2100Z to 09/2100Z: The geomagnetic field was quiet. IIB. Geophysical Activity Forecast: The geomagnetic field activity level will increase from quiet to unsettled early on day 2 as a recurrent coronal hole becomes geoeffective. There is a slight chance of isolated active periods at high latitudes. III. Event Probabilities 10 Dec-12 Dec Class M 15/15/15 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 09 Dec 089 Predicted 10 Dec-12 Dec 085/085/085 90 Day Mean 09 Dec 069 V. Geomagnetic A Indices Observed Afr/Ap 08 Dec 001/000 Estimated Afr/Ap 09 Dec 005/005 Predicted Afr/Ap 10 Dec-12 Dec 005/005-008/008-008/008 VI. Geomagnetic Activity Probabilities 10 Dec-12 Dec A. Middle Latitudes Active 15/20/20 Minor storm 05/15/15 Major-severe storm 01/05/05 B. High Latitudes Active 20/25/25 Minor storm 15/15/15 Major-severe storm 05/05/05