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Index Geophysics

Linearized scattering of surface waves on a spherical Earth


Title (Dublin Core)

en-US Linearized scattering of surface waves on a spherical Earth

Description (Dublin Core)

en-US Recently, a formalism for three-dimensional surface-wave scattering in a plane geometry was derived. Since teleseismic surface-wave data are generally recorded at epicentral distances large enough to be influenced by the sphericity of the Earth, it is necessary to find the effects of a spherical geometry on surface-wave scattering. The theory of surface-wave scattering relies heavily on a dyadic decomposition of the Green's function, and a new derivation is given for the (dyadic) Green's function of a spherically symmetric Earth. This new derivation employs Poisson's sum formula and is more rigorous than previous derivations. Using the dyadic Green's function, a relation is established with the scattering theory in a flat geometry. This finally leads to a linearized formalism for three-dimensional surface-wave scattering on a sphere. Even for shallow surface waves the effects of sphericity are important and necessitate a modification of the propagator terms in the expression for the scattered surface waves.

Creator (Dublin Core)

Snieder, R.
Nolet, G.

Subject (Dublin Core)

en-US Seismology
en-US Normal modes
en-US Surface waves
en-US Scattering
en-US Inversion
en-US Theory

Publisher (Dublin Core)

en-US Journal of Geophysics

Date (Dublin Core)


Type (Dublin Core)

en-US Peer-reviewed Article

Format (Dublin Core)


Identifier (Dublin Core)

Source (Dublin Core)

en-US Journal of Geophysics; Vol 61 No 1 (1987): Journal of Geophysics; 55-63

Language (Dublin Core)


Relation (Dublin Core)