Solar activity increased to moderate levels. Region 687 (N10E65) produced the largest flare of the period, an M2 x-ray flare that occurred at 20/1051Z. A CME was observed in LASCO imagery which does not appear to be Earth directed. This region remains too close to the eastern limb to fully discern magnetic complexity, although it does appear to contain a compact cluster of sunspots exhibiting both polarities. Region 682 (S13W33) produced multiple low level flares today, the largest was a C4/Sf which occurred at 20/0213Z. This region underwent moderate growth today. A beta-gamma magnetic structure is now evident and the sunspot area showed a modest increase during the period. Region 688 (S08W48) showed moderate growth over the period and was numbered today.

Solar activity is expected to be at low to moderate levels. Region 682 and 687 both have a fair potential for the production of isolated M-class flare activity.

The geomagnetic field was at quiet to active levels. Active levels occurred in response to the sustained southward movement of the Bz component of the interplanetary magnetic field.

The geomagnetic field is expected to be at quiet to unsettled levels throughout the period.

  Observé       20 Oct 111
  Prévisionnel   21 Oct-23 Oct  115/120/125
  Moyenne des 90 derniers jours        20 Oct 105

  Observé Afr/Ap 19 Oct  003/004
  Estimé     Afr/Ap 20 Oct  006/012
  Prévisionnel    Afr/Ap 21 Oct-23 Oct  005/008-005/005-005/005