Solar activity remained at low levels. Region 9961 (S21W17) produced a C4/Sf flare at 26/1356 UTC, which was the largest flare of the period. It appeared to simplify and may have lost the delta in its intermediate spots. Region 9963 (N14W03) showed minor spot growth, but remained simply-structured. It produced a C-class subflare early in the period. Region 9957 (N10W58) was quiet as it continued to gradually decay and simplify. However, a weak delta magnetic configuration persisted within its northern spots. Region 9960 (N15W30) was quiet as it slowly decayed and simplified. New Region 9970 (N05E54) emerged just to the south of Region 9969 (N09E55). It appeared to be in a growth phase as it produced occasional subflares.

Solar activity is expected to be at low to moderate levels. There is a fair chance for an isolated, low-level M-class flare. There is a slight chance for major flare activity during the period.

Geomagnetic field activity was at quiet to unsettled levels.

Geomagnetic field activity is expected to be at mostly quiet levels through the period. There is a slight chance for a proton event during the period.

  Observed       26 May 183
  Predicted   27 May-29 May  180/180/175
  90 Day Mean        26 May 183

  Observed Afr/Ap 25 May  003/006
  Estimated     Afr/Ap 26 May  005/008
  Predicted    Afr/Ap 27 May-29 May  007/008-005/008-005/008