Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 254 Issued at 2200Z on 10 Sep 2012 IA. Analysis of Solar Active Regions and Activity from 09/2100Z to 10/2100Z: Solar activity increased to moderate levels. Region 1564 (S12W69) produced an M1 flare at 09/2236Z. Regions 1564 and 1567 (N16E14) produced occasional C-class flares. A filament eruption was observed in SDO 304 imagery at approximately 1000Z from the southwest quadrant. An associated CME was observed over the south pole and had an estimated plane of sky speed of 420 km/s. This CME is not expected to be geoeffective at this time, pending further analysis. Newly numbered Region 1469 (S11E65) rotated onto the disk as an A-type Hax spot group, although additional trailer spots appeared to be rotating into view. IB. Solar Activity Forecast: Solar activity is expected to be low with a chance for an isolated M-class flare for the next three days (11-13 September). IIA. Geophysical Activity Summary 09/2100Z to 10/2100Z: Geomagnetic field activity was at quiet levels throughout the period. A solar sector boundary crossing was observed at the ACE spacecraft at about 1300Z. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels during the period. IIB. Geophysical Activity Forecast: Geomagnetic field activity is expected to be at quiet levels with a chance for unsettled levels during the next three days (11-13 September). III. Event Probabilities 11 Sep-13 Sep