One of the main goals of earthquake science is to identify the susceptible places of the occurrence of Major Earthquakes. Investigation of migration phenomena for earthquakes is one of the most important approaches in seismotectonic studies. If we can accurately determine how the Major Earthquakes moves over time between the Fault segments or the fault systems, we can largely determine the locations of the future Major Earthquakes. This paper studies the migration of major Earthquakes in the Western Alborz. It is most possible that the June 20, 1990, Rudbar earthquake (Mw 7.4), is a sign for the south-east to north-west migration of the Major Earthquakes in the area.