Solar activity was moderate. New Region 126 (S24E62) produced two M-class flares this period. Both were M1/Sf flares, at 20/0512Z and 0928Z, and both were accompanied by minor centimetric bursts. Limb proximity makes it too difficult to accurately assess Region 126's complexity, but initial measurements indicate a D type group with 200 millionths of white light areal coverage. Region 119 (S14W24) continues to grow and the delta configuration is now more pronounced. Despite this region's moderate complexity, flare output has been nothing more than occasional minor C-class flares. Early in the period, a large CME was observed, originating along a filament channel near S30E12. The ejecta does not appear earthward directed. New Regions 127 (S14E19) and 128 (N11E63) were numbered today. Region 127 is in close proximity to Region 122 (S18E21), but the consensus is that these are separate regions.

Solar activity is expected to continue at low to moderate levels. Low M-class flares are possible from Regions 119 and 126.

The geomagnetic field was quiet to unsettled. Solar wind speed began the period near 700 km/s following the arrival of a CME earlier yesterday. However, a weak IMF with sustained northward Bz offset any significant impact on the geomagnetic field.

The geomagnetic field is expected to remain at quiet to unsettled levels for the next three days.

  Observé       20 Sep 164
  Prévisionnel   21 Sep-23 Sep  165/160/160
  Moyenne des 90 derniers jours        20 Sep 178

  Observé Afr/Ap 19 Sep  011/013
  Estimé     Afr/Ap 20 Sep  006/010
  Prévisionnel    Afr/Ap 21 Sep-23 Sep  008/012-008/010-008/010