Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/164127
Title: Full-waveform inversion of high-frequency teleseismic body waves based on multiple plane-wave incidence: methods and practical applications
Authors: Wang, Kai
Wang, Yi
Song, Xin
Tong, Ping
Liu, Qinya
Yang, Yingjie
Keywords: Science::Geology
Issue Date: 2022
Source: Wang, K., Wang, Y., Song, X., Tong, P., Liu, Q. & Yang, Y. (2022). Full-waveform inversion of high-frequency teleseismic body waves based on multiple plane-wave incidence: methods and practical applications. Bulletin of the Seismological Society of America, 112(1), 118-132. https://dx.doi.org/10.1785/0120210094
Project: 04MNP000559C230
Journal: Bulletin of the Seismological Society of America
Abstract: Teleseismic full-waveform inversion has recently been applied to image subwavelength-scale lithospheric structures (typically a few tens of kilometers) by utilizing hybrid methods in which an efficient solver for the 1D background model is coupled with a full numerical solver for a small 3D target region. Among these hybrid methods, the coupling of the fre-quency–wavenumber technique with the spectral element method is one of the most com-putationally efficient ones. However, it is normally based on a single plane-wave incidence, and thus cannot synthesize secondary global phases generated at interfaces outside the target area. To remedy the situation, we propose to use a multiple plane-wave injection method to include secondary global phases in the hybrid modeling. We investigate the performance of the teleseismic full-waveform inversion based on single and multiple plane-wave incidence through an application in the western Pyrenees and compare it with previously published images and the inversion based on a global hybrid method. In addi-tion, we also test the influence of Earth’s spherical curvature on the tomographic results. Our results demonstrate that the teleseismic full-waveform inversion based on a single plane-wave incidence can reveal complex lithospheric structures similar to those imaged using a global hybrid method and is reliable for practical tomography for small regions with an aperture of a few hundred kilometers. However, neglecting the Earth’s spherical curvature and secondary phases leads to errors on the recovered amplitudes of velocity anomalies (e.g., about 2.8% difference for density and VS, and 4.2% for VP on average). These errors can be reduced by adopting a spherical mesh and injecting multiple plane waves in the frequency–wavenumber-based hybrid method. The proposed plane-wave teleseismic full-waveform inversion is promising for mapping subwavelength-scale seismic structures using high-frequency teleseismic body waves ( > 1 Hz) including coda waves recorded at large N seismic arrays.
URI: https://hdl.handle.net/10356/164127
ISSN: 0037-1106
DOI: 10.1785/0120210094
Schools: School of Physical and Mathematical Sciences 
Asian School of the Environment 
Rights: © 2022 Seismological Society of America. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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