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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.