Solar activity was low. An unobserved C6 x-ray flare at 0232UTC was the most energetic event of the day. Region 162 (N26E10) continues to dominate the disk. Although its plage forms one contiguous field, there are indications that the region may contain two bipoles. The westernmost large spot shows hints of a contained magnetic structure, while the easternmost spots, although unorganized, have a distinctive bipolar topology. The region may be reclassified, pending further evolutionary changes. Elsewhere, two new regions, 166 (S06E08) and 167 (N18E75), were assigned.

Solar activity is expected to be low to moderate.

The geomagnetic field was quiet to mildly active. The greater than 2 MeV electrons at GOES were at high levels during the period.

The geomagnetic field is expected to be generally unsettled, with an increasing chance of active levels near the end of the interval. Effects of a high speed solar wind stream may be seen on 26 October.

  觀測的       23 Oct 164
  預測的   24 Oct-26 Oct  165/160/160
  90天平均值        23 Oct 180

  觀測的 Afr/Ap 22 Oct  010/012
  估算值     Afr/Ap 23 Oct  010/010
  預測的    Afr/Ap 24 Oct-26 Oct  010/015-010/010-010/020