Fig. 5
From: Interseismic strain build-up on the submarine North Anatolian Fault offshore Istanbul
Modelled strain rates for a vertical strike-slip fault. The strain for homogenous and layered half space, based on elastic dislocation theory, was estimated using the analytical solution for a horizontally layered half-space and a vertical strike-slip fault37. a Model for creeping below 3 km depth corresponding to slip in the pre-kinematic basement rocks36 and below. Above the locking depth, the fault is fully locked. Below the locking depth, the fault creeps at 20 mm yr−1. The ratio of rigidity between the lower and upper layer is 4. The strain rate sensitivity of the geodetic network is 1.6*10−6 yr−1, corresponding to strike-slip movement of 0.8 mm yr−1 considering a 500 m extension of the geodetic network perpendicular to the fault. b Model for slip below 4.5 km in the basement rocks36. c Creep below 16 km depth corresponding to interseismic deformation. d Dependency of rigidity contrast on the strain rate for a 4.5 km weak layer and creep below 5.5 km. Rigidity contrast from empirical relations is in the range between 8 and 16 (Supplementary Table 2). e Sketch showing the modelling setup and parameters. μ1 and μ2 are the rigidities of the shallow layer and below
