Solar activity was low. The largest event this period was a C5/Sf flare that occurred in Region 9283 (S11W28) at 30/1039Z. This region has been in slow decay over the past 2-3 days, but continues to produce occasional C-class flares. The largest active region on the visible disk is Region 9289 (S07E30) which has now developed into an EKI beta-gamma group nearing 900 millionths of white light area. Frequent brightenings were observed and occasional low C-class flares occurred, but magnetic complexity appears moderate at best. New region 9292 (N25E63) was numbered today.

Solar activity is expected to be low to moderate. Large Region 9289 will continue to produce C-class activity with a good chance of an isolated M-class flare.

The geomagnetic field was quiet.

The geomagnetic field is expected to continue at quiet levels.

  觀測的       30 Dec 182
  預測的   31 Dec-02 Jan  185/175/170
  90天平均值        30 Dec 173

  觀測的 Afr/Ap 29 Dec  006/006
  估算值     Afr/Ap 30 Dec  005/006
  預測的    Afr/Ap 31 Dec-02 Jan  005/010-005/010-005/010