The crustal and upper mantle shear wave velocity structure beneath eastern Turkey using inversion of surface wave dispersion

Abstract

In this study, shear wave velocity structure of the crust and upper mantle across a portion of Eastern Turkey was obtained with one station method, using group and phase velocity dispersion of fundamental mode Rayleigh and Love waves. The S wave velocity structure of the Eastern Turkey is estimated beneath the 29 broadband seismological stations that were deployed during the 1999/2001 ETSE experiment. Rayleigh wave phase velocity is measured between 10 and 85 second periods. Phase velocity is 2.75 km/s for 10 second period and it is 3.9 km/s for 85 second period. On the other hand, Love wave phase velocity is measured between 10 and 50 second periods. Phase velocity is 2.8 km/s for 10 second period and 4.40 km/s for 50 second period. According to the results of S wave velocity inversion? it is found that; between 20 and 30 km depth there is a low velocity layer, which has S wave velocity of approximately 3.4 km/s. The thickness of the crust is calculated as 45 km. S wave velocity, gradually increases between 30 km and 45km.