:Product: 0125RSGA.txt :Issued: 2011 Jan 25 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 025 Issued at 2200Z on 25 Jan 2011 IA. Analysis of Solar Active Regions and Activity from 24/2100Z to 25/2100Z: Solar activity decreased to very low levels. A single B1 flare was observed during the period from Region 1149 (N17W62). Region 1149 showed a decrease in area and was classified as a Dso-beta group. Region 1147 (N24W65) remained stable. IB. Solar Activity Forecast: Solar activity is expected to be very low, with a slight chance for an isolated C-class flare. IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z: The geomagnetic field was at quiet levels, with isolated unsettled periods at high latitudes. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels, with isolated unsettled periods at high latitudes on day one (27 January). Quiet levels are expected on days two and three (27-28 January). III. Event Probabilities 26 Jan-28 Jan Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 25 Jan 081 Predicted 26 Jan-28 Jan 080/079/078 90 Day Mean 25 Jan 084 V. Geomagnetic A Indices Observed Afr/Ap 24 Jan 002/003 Estimated Afr/Ap 25 Jan 003/005 Predicted Afr/Ap 26 Jan-28 Jan 005/005-005/005-005/005 VI. Geomagnetic Activity Probabilities 26 Jan-28 Jan A. Middle Latitudes Active 05/05/05 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 10/10/10 Minor storm 01/01/01 Major-severe storm 01/01/01