The results of the analysis of a seismic regime in zone Vrancea, generating intermediate depth earthquakes, the strongest from which determine seismic danger of the Moldova Republic territory, are present. The basic accent is made on research of seismicity parameters within one year before and after three strong earthquakes (1977, 1986 and 1990), and analysis of their aftershocks. There it is confirmed the invariance of the earthquakes recurrence law for three aftershock sequences. The marked straightening of recurrence graph form within one year before strong events is interpreted in the mechanics of destructions and seismology as a forecasting sign (in this case - retrospectively). The comparison of the recurrence graphs of different stages of seismic process, and also seismic rate graphs has shown, that the seismic regime in a zone Vrancea, as a whole, is stable - influence of strong events ceases to have an effect quickly enough, i.e. the rocks, composing source zone, soon after rupture are restored.