:Product: 1017RSGA.txt :Issued: 2007 Oct 17 2202 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 290 Issued at 2200Z on 17 Oct 2007 IA. Analysis of Solar Active Regions and Activity from 16/2100Z to 17/2100Z: Solar activity was very low. IB. Solar Activity Forecast: Solar activity is expected to remain very low. IIA. Geophysical Activity Summary 16/2100Z to 17/2100Z: The geomagnetic field was quiet. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled, with isolated active periods as a recurrent coronal hole becomes geoeffective. Isolated periods of minor storming may occur at high latitudes on day three (20 Oct) at the expected peak of the high-speed stream influence. III. Event Probabilities 18 Oct-20 Oct Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 17 Oct 067 Predicted 18 Oct-20 Oct 067/067/067 90 Day Mean 17 Oct 068 V. Geomagnetic A Indices Observed Afr/Ap 16 Oct 001/002 Estimated Afr/Ap 17 Oct 003/005 Predicted Afr/Ap 18 Oct-20 Oct 008/010-010/012-012/015 VI. Geomagnetic Activity Probabilities 18 Oct-20 Oct A. Middle Latitudes Active 10/15/20 Minor storm 05/10/10 Major-severe storm 01/05/10 B. High Latitudes Active 15/20/35 Minor storm 10/15/15 Major-severe storm 05/10/10