ИСТИНА

In this study 3D numerical model of compressible ocean behavior in a tsunami source is considered. The model is based on the linear potential theory of ideal homogeneous compressible fluid in the field of gravity. The water layer is bounded with free surface above and with absolutely rigid moving bottom below. Dynamic bottom displacement is specified as vector velocity field. The explicit finite-difference scheme on a rectangular grid is used to solve the problem. Testing of numerical model with use of exact analytical solution of the problem in the case of horizontal flat bottom is described. Taking the 2003 Tokachi-Oki tsunamigenic earthquake as an example the role of horizontal components of dynamic bottom deformation is examined.