the shear wave velocity structure of the central alborz region using combinated method of ambient noise cross-correlations

In traditional studies of the velocity structures of the earth, a seismic source has to be used such as earthquakes or explosions. in new studies, using ambient seismic noise makes it possible to study the deep structures. in the classical ambient noise method is required to using the simultaneous records at the pair’s station. to remove this condition andincrease the number of green’s functions between pairs of stations, we use the new method. the area locates at longitude 48° to 55.5° e and latitude 35° to 37° n which covers the central alborz that includes the damavand volcano and the great city of tehran.