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Rayleigh-wave dispersive energy imaging using a high-resolution linear radon transform

Pure and Applied Geophysics

By:
, , , , ,
DOI: 10.1007/s00024-008-0338-4

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Abstract

Multichannel Analysis of Surface Waves (MASW) analysis is an efficient tool to obtain the vertical shear-wave profile. One of the key steps in the MASW method is to generate an image of dispersive energy in the frequency-velocity domain, so dispersion curves can be determined by picking peaks of dispersion energy. In this paper, we propose to image Rayleigh-wave dispersive energy by high-resolution linear Radon transform (LRT). The shot gather is first transformed along the time direction to the frequency domain and then the Rayleigh-wave dispersive energy can be imaged by high-resolution LRT using a weighted preconditioned conjugate gradient algorithm. Synthetic data with a set of linear events are presented to show the process of generating dispersive energy. Results of synthetic and real-world examples demonstrate that, compared with the slant stacking algorithm, high-resolution LRT can improve the resolution of images of dispersion energy by more than 50%. ?? Birkhaueser 2008.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Rayleigh-wave dispersive energy imaging using a high-resolution linear radon transform
Series title:
Pure and Applied Geophysics
DOI:
10.1007/s00024-008-0338-4
Volume
165
Issue:
5
Year Published:
2008
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Pure and Applied Geophysics
First page:
903
Last page:
922
Number of Pages:
20