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Deformation and Gravity Change : Indicators of isostasy, Tectonics, Volcanism, and Climate Change, Vol. II
A semi-analytical solution to the 2-D forward modelling of viscoelastic relaxation in a heterogeneous sphere induced by a surface toroidal force is derived. The model consists of a concentrically-nested elastic lithosphere, a viscoelastic mantle, and a eccentrically-nested viscoelastic core. Since numerical codes based on finite-element or spectral-finite-difference techniques for modelling viscoeslastic relaxation in spherical geometry in the presence of lateral viscosity variations are becoing more popular, reliable examples for testing and validating such codes are essential.
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