[J05-P] Poster

[J05-P-05] Numerical Simulation of Plate Deformation and Stress in the Andaman Subduction Zone

R. Yadav¹, ^○VM Tiwari¹ (1.CSIR – National Geophysical Research Institute, Hyderabad, India, 2.CSIR – National Geophysical Research Institute, Hyderabad, India)

The oblique subduction of Indo-Australian plate beneath the Eurasian plate in the Sumatra-Andaman region is characterized by the complex deformation patters. In order to investigate surface deformation and stress patterns in the subducting and overriding plate, we have set up a three-dimensional (3D) numerical simulation utilizing 3D density model, derived from the joint modelling of satellite free air anomalies and geoid undulation. The boundary condition for the model is constrained from the plate velocities at the subduction zone and material properties are derived from the seismic velocities and density model. The simulation of stress, strain and velocities, using different rheologies (elastic and viscous) shows a good correlation with the observed GPS velocity components and seismicity of the region.