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We study the recovery of piecewise analytic density and stiffness tensor of athree-dimensional domain from the local dynamical Dirichlet-to-Neumann map. Wegive global uniqueness results if the medium is transversely isotropic withknown axis of symmetry or orthorhombic with known symmetry planes on eachsubdomain. We also obtain uniqueness of a fully anisotropic stiffness tensor,assuming that it is piecewise constant and that the interfaces which separatethe subdomains have curved portions. The domain partition need not to be known.Precisely, we show that a domain partition consisting of subanalytic sets issimultaneously uniquely determined.

Unique recovery of piecewise analytic density and stiffness tensor from the elastic-wave Dirichlet-to-Neumann map