In an extended region of recurrent groups of sunspots the relationships of spots and Hα flare occurrences were analysed on the basis of observations obtained in spring 1978. Principally new spot emergences and the relative motion of spots of opposite
magnetic polarities, belonging to unrelated bipolar spot pairs have been studied in a large activity complex lasting for several rotations. Further observational evidences were found that rapid motion of sunspots is essential to eruption of flares.
(In all speed data given the component of the differential rotation is eliminated.)