Solar activity was at very low levels with only B-class activity observed. Two filament eruptions were observed during the period. A 40 degree long filament, centered near N25E25, was first observed erupting at about 11/0600Z. Shortly after, a 10 degree long filament, centered near N30W17, was first observed lifting off at about 11/0900Z. Stereo-A COR2 imagery observed a pair of CMEs off the NE limb at 11/0754Z and 11/1024Z as a result of the filament activity. At this time, neither of these CMEs are expected to be geoeffective.

Solar activity is expected to be at low levels with a slight chance for M-class activity all three days of the period (12 - 14 December).

The geomagnetic field was at quiet to unsettled levels. Solar wind velocities generally varied between 450 to 500 km/s while the Bz component of the interplanetary magnetic field did not vary much beyond +/- 5 nT.

The geomagnetic field is expected to be at mostly quiet levels all three days of the period (12 - 14 December).

  觀測的       11 Dec 134
  預測的   12 Dec-14 Dec  135/135/135
  90天平均值        11 Dec 146

  觀測的 Afr/Ap 10 Dec  006/008
  估算值     Afr/Ap 11 Dec  006/005
  預測的    Afr/Ap 12 Dec-14 Dec  006/005-006/005-005/005