Solar activity was at low levels. Region 9749 (S08E43) produced a C3/Sf flare at 21/2152 UTC. Three additional optically uncorrelated C-class flares were observed during the period. Region 9742 (N10W16) continues to be the largest and most magnetically complex region on the disk. This region was stable and appears to have slightly decreased in areal coverage during the period. A 15-degree filament near S19E26 disappeared sometime between 22/0108 UTC and 22/0225 UTC. A second, smaller, filament disappeared near N15E49 between 22/1636 UTC and 22/1653 UTC. New Regions 9752 (S14W19) and 9753 (S20E67) were numbered today.

Solar activity is expected to be at low to moderate levels. Region 9742 remains capable of producing M-class flares and there is a chance for an isolated major flare from this region.

The geomagnetic field was at quiet to unsettled levels.

The geomagnetic field is expected to be at quiet to unsettled levels. High latitudes may experience isolated active conditions on days two and three of the period as a favorably positioned coronal hole is expected to become geoeffective.

  觀測的       22 Dec 243
  預測的   23 Dec-25 Dec  245/250/250
  90天平均值        22 Dec 218

  觀測的 Afr/Ap 21 Dec  009/011
  估算值     Afr/Ap 22 Dec  010/010
  預測的    Afr/Ap 23 Dec-25 Dec  008/010-010/012-005/010