Solar activity decreased to low levels today. Flare activity was sparse, although Region 543 (S16W21) produced a C2/Sf that occurred at 21/0036Z. A slight decay was seen in this region since yesterday. Region 540 (S14W35) lost the delta structure in the trailing position of spot cluster overnight. Region 542 (N10W16) underwent no significant changes. Region 544 (N08W04) decayed slightly in penumbral coverage during the period. All spotted regions retain their beta-gamma magnetic features. A 28 degree disappearing solar filament was observed on SXI and SOHO/EIT imagery near 21/1200Z. LASCO imagery is inconclusive at this time but initial C2 data indicates there is a resulting CME from this activity. No new regions were numbered today.

Solar activity is expected to be at low to moderate levels.

The geomagnetic field was at quiet to unsettled levels. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels today.

The geomagnetic field is expected to range from quiet to minor storm levels. Isolated periods of major storm conditions are possible with the onset of the anticipated shock passage, due early on 22 Jan; resulting from the long duration C-flare that occurred late on 19 Jan. Unsettled to active levels are expected on 23 Jan. Predominantly quiet to unsettled conditions should return by 24 Jan.

  Observed       21 Jan 130
  Predicted   22 Jan-24 Jan  130/130/125
  90 Day Mean        21 Jan 137

  Observed Afr/Ap 20 Jan  011/016
  Estimated     Afr/Ap 21 Jan  010/015
  Predicted    Afr/Ap 22 Jan-24 Jan  030/045-015/025-010/015