A new coupled spectral element and modal solution method for global seismology: A first application to the scattering induced by a plume‐like anomaly | Zendy

Capdeville Y. | Zendy; Larmat C. | Zendy; Vilotte J.P. | Zendy; Montagner J.P. | Zendy

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A new coupled spectral element and modal solution method for global seismology: A first application to the scattering induced by a plume‐like anomaly

Author(s) -

Capdeville Y.,

Larmat C.,

Vilotte J.P.,

Montagner J.P.

Publication year - 2002

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/2001gl013747

Subject(s) - discontinuity (linguistics) , seismogram , plume , modal , scattering , spectral element method , computer simulation , geology , perturbation (astronomy) , physics , geophysics , seismology , mechanics , finite element method , mathematical analysis , optics , mathematics , materials science , meteorology , quantum mechanics , polymer chemistry , extended finite element method , thermodynamics

The possibilities of a new numerical simulation method based on the coupling of the Spectral Element Method (SEM) with a modal solution method are illustrated by experiments focusing on the scattering induced by a localized plume‐like inclusion in a modified PREM. The plume is represented by a vertical cylindrical inclusion extending from the surface to the 660 km discontinuity. We present seismograms computed down to 50 s and assess the limits of a first order mode perturbation (Born approximation) method against the new numerical simulation.

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