:Product: 1027RSGA.txt :Issued: 2010 Oct 27 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 300 Issued at 2200Z on 27 Oct 2010 IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: Solar activity was at low levels. Region 1117 (N22W28) produced a C1.2/Sf at 27/1703Z. The remaining regions were quiet and unchanged. IB. Solar Activity Forecast: Solar activity is expected to be very low to low with a slight chance for an M-class event from Region 1117. IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: The geomagnetic field was at quiet levels for the past 24 hours. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet on day one (28 October). Quiet to unsettled levels, with isolated active periods, are expected on days two and three (29-30 October) in response to the CME observed on 26 October. III. Event Probabilities 28 Oct-30 Oct Class M 10/10/10 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 27 Oct 088 Predicted 28 Oct-30 Oct 084/084/084 90 Day Mean 27 Oct 081 V. Geomagnetic A Indices Observed Afr/Ap 26 Oct 006/008 Estimated Afr/Ap 27 Oct 005/005 Predicted Afr/Ap 28 Oct-30 Oct 005/005-008/008-008/008 VI. Geomagnetic Activity Probabilities 28 Oct-30 Oct A. Middle Latitudes Active 10/15/15 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 10/20/20 Minor storm 01/01/01 Major-severe storm 01/01/01