:Product: 1116RSGA.txt :Issued: 2011 Nov 16 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 320 Issued at 2200Z on 16 Nov 2011 IA. Analysis of Solar Active Regions and Activity from 15/2100Z to 16/2100Z: Solar activity was moderate due to an M-class flare observed during the period. Region 1348 (N20,L088), which rotated off of the west limb, produced an M1/1f at 15/2235Z. IB. Solar Activity Forecast: Solar activity is expected to be low with a chance for isolated M-class activity through the period (17 - 19 November). IIA. Geophysical Activity Summary 15/2100Z to 16/2100Z: The geomagnetic field was at quiet levels throughout the period. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be mostly quiet on day one (17 November). By day two and three (18 - 19 November), the field is expected to be at quiet to unsettled levels with isolated active periods, in response to a possible glancing blow from the coronal mass ejection observed late on 14 November. III. Event Probabilities 17 Nov-19 Nov Class M 40/40/40 Class X 05/05/05 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 16 Nov 142 Predicted 17 Nov-19 Nov 145/150/150 90 Day Mean 16 Nov 136 V. Geomagnetic A Indices Observed Afr/Ap 15 Nov 007/006 Estimated Afr/Ap 16 Nov 004/003 Predicted Afr/Ap 17 Nov-19 Nov 005/005-007/007-008/008 VI. Geomagnetic Activity Probabilities 17 Nov-19 Nov A. Middle Latitudes Active 06/10/10 Minor storm 02/02/02 Major-severe storm 01/01/01 B. High Latitudes Active 16/17/17 Minor storm 17/22/22 Major-severe storm 10/13/13