Fig. 6
From: 3D crustal structure of the northwest Alborz region (Iran) from local earthquake tomography
a Derivative weight sum (DWS), b resolution diagonal elements (RDE) and c inversion results for horizontal sections at 5, 8, and 12 km. Gray triangles show stations and black solid lines show the surface trace of the fault. The best resolved region (RDE value >0.1) is outlined with black (b) and white (c) polygons. Light gray area in part (c) masks cells that are hit by rays. Note the local high velocity anomaly (star) in a depth of 5.0 km that extends across the NTF, whereas at 8.0 km and 12.0 km depth range this fault separates the high velocity on its southern side from the low velocity on its northern side