Analyzing the structure of the crust of the Northwestern Aegean region with the help of sismologial data

Northwestern Aegean Region is affected by both south branch of North Anatolian Fault Zone and N-S extensional regime in West Anatolia. It is important that this study is the first study about crust structure of Northwestern Aegean Region. Therefore, for this area M > 2.5 earthquake data which occurred between 1993 and 2005 are used in this study. Computer programs are prepared and analysis is done using these data. Time-distance graphics and iso-velocity contour maps are prepared. In this study V1 velocity between 5.1 ? 5.5 km/sec, V2 velocity between 6.0 ? 6.5 km/sec and V3 velocity between 7.8 ? 8.0 km/sec are calculated. For the thickness of the crust, the 1st layer has values between 10-15 km and the 2nd layer has values between 16-22 km. Total crust thickness in Northwestern Aegean Region varies between 30 and 34 km. The crustal structure beneath the Northwestern Aegean Region is almost same as to global crustal model.