Deformation changes of the Earth's crust in the area of high tectonic stress

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   At present, radio interferometry methods are actively used to determine
   Earth's surface deformations. The strongest displacements are caused by
   earthquakes, volcanic eruptions and great landslides. Such tasks require
   an adequate mathematical model for the stress-strain state of the Earth
   crust rocks.

   The paper presents one of the possible approaches to describe deformation
   changes in the result of big seismic events. As the Earth crust model the
   approximation in the form of homogeneous isotropic elastic half-space with
   a combination of double forces, which correspond to earthquake mechanism,
   is chosen.

   The model calculates the area of surface deformations, using maximum shear
   stress and dilatancy. Numerical modeling of surface deformations of the
   Earth's crust is carried out for the Japanese earthquake on March 11,
   2011. The simulation results are compared with the displacement of the
   Earth's crust, obtained by radar measurement of ALOS and Envisat
   satellites.