The «Seis-asz» software complex has been developed, it allows to process the flows of seismic events with graphing of various parameters of these flows in a running window. The main parameter in this system is instability criteria of seismic process, determined by response of the medium to the tidal exposure (the LURR-method). With help of the «Seis-asz» software complex for seismically active region of Russia – Sakhalin – it has been analyzed the flows of seismic events in time to reveal the phases of seismic process instability timed to preparing of major earthquakes. In terms of the findings fundamental possibility of medium-term forecast by the LURR-method is shown. The complex can be used to evaluate seismic hazard in real time if live seismic data are available.