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

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Title: Cube2sph : A toolkit enabling flexible and accurate continental-scale seismic wave simulations using the SPECFEM3D_Cartesian package.
Authors: Liu, Tianshi1 (AUTHOR) tianshi.liu@mail.utoronto.ca, Wang, Kai2 (AUTHOR), Xie, Yujiang3 (AUTHOR), He, Bin4,5 (AUTHOR), Lei, Ting1 (AUTHOR), Du, Nanqiao1 (AUTHOR), Tong, Ping6,7,8 (AUTHOR), Yang, Yingjie9 (AUTHOR), Rychert, Catherine A.3,10 (AUTHOR), Harmon, Nicholas3,10 (AUTHOR), Grasselli, Giovanni11 (AUTHOR), Liu, Qinya1,4 (AUTHOR)
Source: Computers & Geosciences. Aug2024, Vol. 190, pN.PAG-N.PAG. 1p.
Subjects: Seismic waves, Curvature
Abstract: 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°. • Flexible mesh generation for accurate continental-scale seismic wave simulations. • Curvilinear-grid implementation of perfectly matched layer to accommodate deformed mesh. • Numerical examples with practical guidance for continental-scale seismic wave simulations. [ABSTRACT FROM AUTHOR]
Copyright of Computers & Geosciences is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 178188887
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Cube2sph : A toolkit enabling flexible and accurate continental-scale seismic wave simulations using the SPECFEM3D_Cartesian package.
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  Data: <searchLink fieldCode="AR" term="%22Liu%2C+Tianshi%22">Liu, Tianshi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> tianshi.liu@mail.utoronto.ca</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Kai%22">Wang, Kai</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xie%2C+Yujiang%22">Xie, Yujiang</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22He%2C+Bin%22">He, Bin</searchLink><relatesTo>4,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lei%2C+Ting%22">Lei, Ting</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Du%2C+Nanqiao%22">Du, Nanqiao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tong%2C+Ping%22">Tong, Ping</searchLink><relatesTo>6,7,8</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Yingjie%22">Yang, Yingjie</searchLink><relatesTo>9</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rychert%2C+Catherine+A%2E%22">Rychert, Catherine A.</searchLink><relatesTo>3,10</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Harmon%2C+Nicholas%22">Harmon, Nicholas</searchLink><relatesTo>3,10</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Grasselli%2C+Giovanni%22">Grasselli, Giovanni</searchLink><relatesTo>11</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Qinya%22">Liu, Qinya</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Computers+%26+Geosciences%22">Computers & Geosciences</searchLink>. Aug2024, Vol. 190, pN.PAG-N.PAG. 1p.
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  Data: 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°. • Flexible mesh generation for accurate continental-scale seismic wave simulations. • Curvilinear-grid implementation of perfectly matched layer to accommodate deformed mesh. • Numerical examples with practical guidance for continental-scale seismic wave simulations. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Computers & Geosciences is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.cageo.2024.105644
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      – Code: eng
        Text: English
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      – SubjectFull: Seismic waves
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      – SubjectFull: Curvature
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              Text: Aug2024
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