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Transformation of the earthquake displacement field for spherical earth—Static case

DEPARTMENT OF MATHEMATICS KURUKSHETRA UNIVERSITY, KURUKSHETRA, India

Abstract

Explicit expressions for the static displacement field for a Volterra dislocation and a center of compression in an infinite homogeneous medium are obtained. Using an addition theorem, the field is transformed to a polar coordinate system with origin at the center of the Earth. Expressions for the discontinuity in the motion stress vector across the concentric spherical surface through the source are then obtained. These results can be used in studying the deformation of a multilayered spherical earth model induced by internal sources by the Thomson-Haskell matrix method which has so far been mostly applied to dynamic problems.