Solar activity increased to moderate levels. Region 9787 (S07E59) produced an impulsive M1/Sf flare at 19/1005 UTC with minor radio emission. Minor growth occurred in this region, but it remained simply structured. Minor growth also occurred in Regions 9786 (S25W32) and 9788 (N17E40), but both remained simple bipoles. Region 9788 produced a low-level C-class flare late in the period. Region 9782 showed a minor decrease in area and continued to display minor polarity mixing within its southern leader spots. A large filament disappeared from the northeast quadrant late on 18 January. SOHO EIT/LASCO images showed that the filament gradually disappeared and was followed by a relatively slow, non-Earth directed CME. New Regions 9789 (N15W02) and 9790 (N28E25) were numbered.

Solar activity is expected to be low to moderate. There will be a chance for an isolated low-level M-class flare during the period.

Geomagnetic field activity ranged from quiet to minor storm levels. Activity increased to unsettled to minor storm levels during 19/1200 - 1800 UTC, then decreased to mostly unsettled levels. The increased activity was likely due to coronal hole effects.

Geomagnetic field activity is expected to be at quiet to unsettled levels during most of the period. However, brief active conditions will be possible early in the period due to coronal hole effects.

  Observé       19 Jan 214
  Prévisionnel   20 Jan-22 Jan  220/225/230
  Moyenne des 90 derniers jours        19 Jan 223

  Observé Afr/Ap 18 Jan  005/005
  Estimé     Afr/Ap 19 Jan  012/012
  Prévisionnel    Afr/Ap 20 Jan-22 Jan  012/010-010/010-008/008