The Characteristics of Seismic Rotations in VTI Medium

Under the assumptions of linear elasticity and small deformation in traditional elastodynamics, the anisotropy of the medium has a significant effect on rotations observed during earthquakes. Based on the basic theory of the first-order velocity-stress elastic wave equation, this paper simulates the...

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Autores principales:	Lixia Sun, Yun Wang, Wei Li, Yongxiang Wei
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	rotation translation isotropic medium VTI Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/dc069f8155eb4265960b73bcf6963130
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spelling	oai:doaj.org-article:dc069f8155eb4265960b73bcf69631302021-11-25T16:39:15ZThe Characteristics of Seismic Rotations in VTI Medium10.3390/app1122108452076-3417https://doaj.org/article/dc069f8155eb4265960b73bcf69631302021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/10845https://doaj.org/toc/2076-3417Under the assumptions of linear elasticity and small deformation in traditional elastodynamics, the anisotropy of the medium has a significant effect on rotations observed during earthquakes. Based on the basic theory of the first-order velocity-stress elastic wave equation, this paper simulates the seismic wave propagation of the translational and rotational motions in two-dimensional isotropic and VTI (transverse isotropic media with a vertical axis of symmetry) media under different source mechanisms with the staggered-grid finite-difference method with respect to nine different seismological models. Through comparing the similarities and differences between the translational and rotational components of the wave fields, this paper focuses on the influence of anisotropic parameters on the amplitude and phase characteristics of the rotations. We verify that the energy of S waves in the rotational components is significantly stronger than that of P waves, and the response of rotations to the anisotropic parameters is more sensitive. There is more abundant information in the high-frequency band of the rotational components. With the increase of Thomsen anisotropic parameters ε and δ, the energy of the rotations increases gradually, which means that the rotational component observation may be helpful to the study of anisotropic parameters.Lixia SunYun WangWei LiYongxiang WeiMDPI AGarticlerotationtranslationisotropic mediumVTITechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10845, p 10845 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	rotation translation isotropic medium VTI Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	rotation translation isotropic medium VTI Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Lixia Sun Yun Wang Wei Li Yongxiang Wei The Characteristics of Seismic Rotations in VTI Medium
description	Under the assumptions of linear elasticity and small deformation in traditional elastodynamics, the anisotropy of the medium has a significant effect on rotations observed during earthquakes. Based on the basic theory of the first-order velocity-stress elastic wave equation, this paper simulates the seismic wave propagation of the translational and rotational motions in two-dimensional isotropic and VTI (transverse isotropic media with a vertical axis of symmetry) media under different source mechanisms with the staggered-grid finite-difference method with respect to nine different seismological models. Through comparing the similarities and differences between the translational and rotational components of the wave fields, this paper focuses on the influence of anisotropic parameters on the amplitude and phase characteristics of the rotations. We verify that the energy of S waves in the rotational components is significantly stronger than that of P waves, and the response of rotations to the anisotropic parameters is more sensitive. There is more abundant information in the high-frequency band of the rotational components. With the increase of Thomsen anisotropic parameters ε and δ, the energy of the rotations increases gradually, which means that the rotational component observation may be helpful to the study of anisotropic parameters.
format	article
author	Lixia Sun Yun Wang Wei Li Yongxiang Wei
author_facet	Lixia Sun Yun Wang Wei Li Yongxiang Wei
author_sort	Lixia Sun
title	The Characteristics of Seismic Rotations in VTI Medium
title_short	The Characteristics of Seismic Rotations in VTI Medium
title_full	The Characteristics of Seismic Rotations in VTI Medium
title_fullStr	The Characteristics of Seismic Rotations in VTI Medium
title_full_unstemmed	The Characteristics of Seismic Rotations in VTI Medium
title_sort	characteristics of seismic rotations in vti medium
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/dc069f8155eb4265960b73bcf6963130
work_keys_str_mv	AT lixiasun thecharacteristicsofseismicrotationsinvtimedium AT yunwang thecharacteristicsofseismicrotationsinvtimedium AT weili thecharacteristicsofseismicrotationsinvtimedium AT yongxiangwei thecharacteristicsofseismicrotationsinvtimedium AT lixiasun characteristicsofseismicrotationsinvtimedium AT yunwang characteristicsofseismicrotationsinvtimedium AT weili characteristicsofseismicrotationsinvtimedium AT yongxiangwei characteristicsofseismicrotationsinvtimedium
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The Characteristics of Seismic Rotations in VTI Medium

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