Comparison of straight and curved-ray surface wave tomography at near-surface scale

A 3d numerical example

Conference paper (2022)

Authors

M. Karimpour Polytechnic University of Turin
E.C. Slob Applied Geophysics and Petrophysics - CEG
Laura Valentina Socco Polytechnic University of Turin
Research Group
Applied Geophysics and Petrophysics (CEG) (TU Delft)
Copyright: © 2022 M. Karimpour, E.C. Slob, L. V. Socco
DOI: https://doi.org/10.3997/2214-4609.202210595
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Published Date

2022

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Geoscience and Engineering

Research Group

Applied Geophysics and Petrophysics

Abstract

Surface Wave Tomography (SWT) is used to build shear-wave velocity models. In some studies, it is assumed that surface waves propagation follows a straight line between the source and the receiver. This assumption might be violated in near-surface studies because of high level of complexity and lateral heterogeneity. In curved-ray SWT, the actual ray paths between every receiver couple are computed. Curved-ray SWT can increase the accuracy of the model and will increase the computational effort. It is important to investigate the gained model improvement together with the associated additional computational cost from curved-ray over straight-ray SWT for near-surface applications. We apply straight- and curved-ray SWT on a generated 3D synthetic dataset and compare the results in terms of accuracy and computational costs.

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