Solar activity was very low. The now spotless Region 235 (N13W08) produced a subfaint flare early in the period, but has been quiet since. Occasional intensity enhancements accompanied a small increase in the size and complexity of Region 236 (N16W41). New Regions 237 (S26E00) and 238 (N09E15) were numbered today. The remaining regions are small, showing no significant changes this period. There are several large, but mostly quiescent filaments on the visible disk. Occasional motion was noted in the large filament centered near N22W12. A long duration, but low intensity X-ray enhancement was observed beginning at around 28/1700Z. This was likely associated with a strong CME that appears to have originated behind the NW limb.

Solar activity is expected to be low to very low. There's a chance for low C-class activity from Regions 234 (N19E19) and 236.

The geomagnetic field was mostly unsettled to active at all latitudes. A high speed stream, associated with a large equatorial coronal hole, began late on 26 Dec and continues to buffet the magnetic field. The peak solar wind in this high speed stream exceeded 750 km/s, but has declined slowly to near 650 km/s by the end of the period. The greater than 2 MeV electron fluxes at geosynchronous orbit reached high levels.

The geomagnetic field is expected to be at quiet to active levels. The high speed coronal hole stream currently impacting the geomagnetic field will gradually subside through day one. Ejecta from the CME off the NW limb late in the period today does not appear Earthbound. Expect mostly unsettled levels through days two and three of the period.

  Observed       28 Dec 117
  Predicted   29 Dec-31 Dec  115/115/120
  90 Day Mean        28 Dec 166

  Observed Afr/Ap 27 Dec  022/037
  Estimated     Afr/Ap 28 Dec  020/020
  Predicted    Afr/Ap 29 Dec-31 Dec  015/015-008/010-008/010