S. Üsküplü, H. Saygin, and S. Ergintav (Turkey)
3-D Modeling, Earth System Modeling, Simulation, Finite Differences
One of the most important problems of the seismology is modeling the propagation of the body and surface waves. Lots of numerical methods are used to model wave propagation in accordance with a realistic earth model. In this work, a 3-D staggered-grid finite difference scheme is presented to simulate elastic wave propagation. 3-D seismic response of the earth is computed for the heterogeneous medium, whose density and velocity distribution is known. Our approach is based on the velocity and stress formulation of the wave propagation and the formulation is discretised by a staggered-grid finite difference scheme fourth-order accurate in space and second-order accurate in time. This modeling approach is applied to Eastern Marmara Sea region, Turkey. In the aftermath of the 1999 earthquakes (Mw=7.4 and 7.2) in this area, the general consensus has been that the floor of the Marmara Sea became a target for the next big earthquake of the North Anatolian Fault system. Our goal is to display the ground response of the 1999 earthquakes and estimate ground response of the future devastating earthquake in the Marmara Sea.
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