SPECTRAL ELEMENT MODELLING OF THREE-DIMENSIONAL WAVE PROPAGATION IN A SELF-GRAVITATING EARTH WITH AN ARBITRARILY STRATIFIED OUTER CORE
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dc.contributor.author | Chaljub E. | |
dc.contributor.author | Valette B. | |
dc.date.accessioned | 2022-09-23T00:35:28Z | |
dc.date.available | 2022-09-23T00:35:28Z | |
dc.date.issued | 2004 | |
dc.identifier | https://elibrary.ru/item.asp?id=6638730 | |
dc.identifier.citation | Geophysical Journal International, 2004, 158, 1, 131-141 | |
dc.identifier.issn | 0956-540X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/38719 | |
dc.description.abstract | This paper deals with the spectral element modelling of seismic wave propagation on a global scale. Two aspects relevant to low-frequency studies are particularly emphasized. First, the method is generalized beyond the Cowling approximation in order to fully account for the effects of self-gravitation. In particular, the perturbation of the gravity field outside the Earth is handled by a projection of the spectral element solution onto the basis of spherical harmonics. Second, we propose a new formulation inside the fluid which allows us to account for an arbitrary density stratification. It is based upon a decomposition of the displacement into two scalar potentials, and results in a fully explicit fluid-solid coupling strategy. The implementation of the method is carefully detailed and its accuracy is demonstrated through a series of benchmark tests. | |
dc.subject | BRUNT-VAISALA FREQUENCY | |
dc.subject | ELASTODYNAMICS | |
dc.subject | GLOBAL SEISMOLOGY | |
dc.subject | NUMERICAL MODELLING | |
dc.subject | SELF-GRAVITATION | |
dc.subject | SPECTRAL ELEMENT METHOD | |
dc.subject | SYNTHETIC SEISMOGRAMS | |
dc.title | SPECTRAL ELEMENT MODELLING OF THREE-DIMENSIONAL WAVE PROPAGATION IN A SELF-GRAVITATING EARTH WITH AN ARBITRARILY STRATIFIED OUTER CORE | |
dc.type | Статья |
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