Solar activity was low during the past 24 hours. Today's largest event was a C4/Sf from Region 9960 (N14E35). A comparison of white light and magnetogram data indicate that this region has a small delta configuration. Region 9961 (N14E35) also produced some C-class subflares today and shows a compact delta in the leading part of the group. Region 9957 (N09E08) continues to be the largest group on the disk and also possesses a delta. However, this region was quiet and stable today, and is beginning to show signs of decay.

Solar activity is expected to be moderate during the next three days. The most likely sources for energetic flare activity are 9957 and 9961, although 9960 could contribute an isolated M-class event. There is a slight chance for an X-class flare or proton producing event.

The geomagnetic field was mostly quiet to unsettled. There was one period of active conditions from 0600-0900 UTC at high latitudes.

The geomagnetic field is expected to be predominantly quiet to unsettled for the next three days. There is a slight chance for some isolated active periods on day two (due to the CME of 19/2026 UTC) and on day three due to possible coronal hole effects.

  觀測的       21 May 186
  預測的   22 May-24 May  180/180/175
  90天平均值        21 May 184

  觀測的 Afr/Ap 20 May  008/014
  估算值     Afr/Ap 21 May  008/010
  預測的    Afr/Ap 22 May-24 May  005/010-012/012-012/010