:Product: 1111RSGA.txt :Issued: 2010 Nov 11 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 315 Issued at 2200Z on 11 Nov 2010 IA. Analysis of Solar Active Regions and Activity from 10/2100Z to 11/2100Z: Solar activity has been at low levels for the past 24 hours. Multiple C-class events were observed throughout the period, the largest being a C4.7/Sf from Region 1123 (S22E03) at 11/0724Z. Associated with this event were discrete radio emissions at 245 MHz and a partial-halo CME observed in LASCO imagery at 11/0824Z and STEREO A at 11/0809Z. New Region 1125 (N19E34) was numbered early in the period. IB. Solar Activity Forecast: Solar activity is expected to be at low levels with a chance for M-class events for the next three days (12-14 November). IIA. Geophysical Activity Summary 10/2100Z to 11/2100Z: The geomagnetic field has been at quiet to active levels for the past 24 hours, with isolated minor storm periods at high latitudes. At about 11/0200Z, signatures at the ACE satellite indicated an increase in temperature, density and wind velocity. The Bz component of the interplanetary field (IMF) occasionally turned southward reaching a maximum deflection of -9 nT at 11/1208Z. The Bt component of the IMF reached a maximum of 12 nT at 11/0304Z. These disturbances are believed to be the result of a slow moving CME. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels for the next three days (12-14 November). III. Event Probabilities 12 Nov-14 Nov Class M 25/25/25 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 11 Nov 085 Predicted 12 Nov-14 Nov 085/085/084 90 Day Mean 11 Nov 081 V. Geomagnetic A Indices Observed Afr/Ap 10 Nov 003/004 Estimated Afr/Ap 11 Nov 010/010 Predicted Afr/Ap 12 Nov-14 Nov 007/010-007/010-007/008 VI. Geomagnetic Activity Probabilities 12 Nov-14 Nov A. Middle Latitudes Active 15/10/10 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 20/15/15 Minor storm 01/01/01 Major-severe storm 01/01/01