Solar activity decreased to low levels. Region 9591 (S17E53) produced frequent, impulsive mid-level C-class flares with minor radio emission. This region showed a magnetic delta structure in its trailing sunspots and a weak delta in its interior spots. Currently, Region 9591 spans about 30 degrees in longitude. However, it appeared likely this region was comprised of two abutted sunspot groups, which may be split into separate groups once this complex rotates further into view. Minor polarity mixing was evident in Regions 9582 (N28W33) and 9585 (N14W16), but both regions were inactive as they showed signs of decay. The remaining active regions were unremarkable. New Region 9593 (N00E01) was numbered.

Solar activity is expected to be moderate with a good chance for an isolated M-class flare from Region 9591. There is also a slight chance for a major flare from this region.

Geomagnetic field activity decreased to quiet to unsettled levels as coronal hole effects subsided.

Geomagnetic field activity is expected to be at quiet to unsettled levels during the first half of the period increasing to unsettled to active levels during the rest of the period. There will be a slight chance for a proton event during the period. The greater than 2 MeV electron flux at geosynchronous orbit may reach high levels during the first half of the forecast period.

  Observed       23 Aug 170
  Predicted   24 Aug-26 Aug  175/180/180
  90 Day Mean        23 Aug 152

  Observed Afr/Ap 22 Aug  014/017
  Estimated     Afr/Ap 23 Aug  009/010
  Predicted    Afr/Ap 24 Aug-26 Aug  010/010-012/012-015/012