Cube2sph : A toolkit enabling flexible and accurate continental-scale seismic wave simulations using the SPECFEM3D_Cartesian package

Liu，Tianshi1; Wang，Kai2; Xie，Yujiang3; He，Bin9,10; Lei，Ting1; Du，Nanqiao1; Tong，Ping4,5,6; Yang，Yingjie7; Rychert，Catherine A.3,11; Harmon，Nicholas3,11; Grasselli，Giovanni8; Liu，Qinya1,9

2024-08-01

10.1016/j.cageo.2024.105644

Computers and Geosciences   影响因子和分区

0098-3004

To enable flexible and accurate seismic wave simulations at continental scales (10°−60°) based on the spectral-element method using the open-source SPECFEM3D_Cartesian package, we develop a toolkit, Cube2sph, that allows the generation of customized spherical meshes that account for the Earth's curvature. This toolkit enables the usage of the perfectly matched layer (PML) absorbing boundary condition even when the artificial boundaries do not align with the coordinate axes. A series of numerical experiments are presented to validate the effectiveness of this toolkit. From these numerical experiments, we conclude that (1) continental-scale seismic wave simulations, especially surface wave simulations, can be more efficiently performed without the loss of accuracy by truncating the mesh at an appropriate depth, (2) curvilinear-grid PML can be used to effectively suppress artificial reflections for seismic wave simulations at continental scales, and (3) the Earth's spherical geometry needs to be accurately meshed in order to obtain accurate simulation results for study regions larger than 8°.

High-performance computing Perfectly matched layer Seismology Spectral-element method

SCI ; EI

英语

其他

20242516288804

Numerical methods ; Seismology ; Surface waves

Seismology:484 ; Earthquake Measurements and Analysis:484.1 ; Numerical Methods:921.6

COMPUTER SCIENCE

2-s2.0-85196315543

Scopus

1.Department of Earth Sciences,University of Toronto,Ontario,Toronto,Canada
2.School of Earth and Space Sciences,University of Science and Technology of China,Anhui,Hefei,China
3.University of Southampton,Ocean and Earth Science,Southampton,United Kingdom
4.Division of Mathematical Sciences,School of Physical and Mathematical Sciences,Nanyang Technological University,637371,Singapore
5.Earth Observatory of Singapore,Nanyang Technological University,639798,Singapore
6.Asian School of the Environment,Nanyang Technological University,639798,Singapore
7.Department of Earth and Space Sciences,Southern University of Science and Technology,Guangdong,Shenzhen,518055,China
8.Department of Civil & Mineral Engineering,University of Toronto,Ontario,Toronto,Canada
9.Department of Physics,University of Toronto,Ontario,Toronto,Canada
10.Department of Geosciences,the University of Texas at Dallas,Richardson,75080,United States
11.Woods Hole Oceanographic Institution,Woods Hole,United States

Liu，Tianshi,Wang，Kai,Xie，Yujiang,et al. Cube2sph : A toolkit enabling flexible and accurate continental-scale seismic wave simulations using the SPECFEM3D_Cartesian package[J]. Computers and Geosciences,2024,190.

Liu，Tianshi.,Wang，Kai.,Xie，Yujiang.,He，Bin.,Lei，Ting.,...&Liu，Qinya.(2024).Cube2sph : A toolkit enabling flexible and accurate continental-scale seismic wave simulations using the SPECFEM3D_Cartesian package.Computers and Geosciences,190.

Liu，Tianshi,et al."Cube2sph : A toolkit enabling flexible and accurate continental-scale seismic wave simulations using the SPECFEM3D_Cartesian package".Computers and Geosciences 190(2024).