:Product: 1118RSGA.txt :Issued: 2009 Nov 18 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 322 Issued at 2200Z on 18 Nov 2009 IA. Analysis of Solar Active Regions and Activity from 17/2100Z to 18/2100Z: Solar activity has been at very low levels for the past 24 hours. Two regions were numbered today. Region 1032 (N17E20) and Region 1033 (N21E47) were both magnetically classified as Beta groups. IB. Solar Activity Forecast: Solar activity is expected to be at very low to low levels. With the emergence of Regions 1032 and 1033, there is a slight chance for a C-class flare. IIA. Geophysical Activity Summary 17/2100Z to 18/2100Z: The geomagnetic field has been mostly quiet for the past 24 hours. An isolated unsettled period at mid-latitudes occurred between 18/0600-0900Z. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to remain at quiet levels for day one (19 November). Unsettled, with isolated active conditions, are expected on day two and three (20-21 November) due to a recurrent coronal hole high-speed stream. III. Event Probabilities 19 Nov-21 Nov Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 18 Nov 076 Predicted 19 Nov-21 Nov 079/080/080 90 Day Mean 18 Nov 072 V. Geomagnetic A Indices Observed Afr/Ap 17 Nov 000/001 Estimated Afr/Ap 18 Nov 002/003 Predicted Afr/Ap 19 Nov-21 Nov 007/007-010/011-015/015 VI. Geomagnetic Activity Probabilities 19 Nov-21 Nov A. Middle Latitudes Active 10/20/30 Minor storm 05/10/15 Major-severe storm 01/01/01 B. High Latitudes Active 10/20/30 Minor storm 05/10/15 Major-severe storm 01/01/01