Shallow surface wave inversion – research and applications in Western Australia

Adam O’Neill; Mike Dentith; Ron List

doi:10.1071/ASEG2003ab119

ISSN: 2202-0586
E-ISSN:

oa Shallow surface wave inversion – research and applications in Western Australia
Authors Adam O’Neill^a, Mike Dentith^b and Ron List^c
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^a Department of Geology and Geophysics, The University of Western Australia, [email protected] ^b Department of Geology and Geophysics, The University of Western Australia, [email protected] ^c Department of Mathematics and Statistics, The University of Western Australia, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2003, Issue ASEG2003 - 16th Geophysical Conference, Aug 2003, p. 1 - 5
DOI: https://doi.org/10.1071/ASEG2003ab119
- Published online: 01 Aug 2003

Abstract

Existing surface wave modelling methods fail to correctly interpret some critical engineering scenarios, for example Earth models comprising 'soft' under 'hard' layers. Numerical and experimental repeatability analyses and the use of synthetic seismograms to reproduce the field data exactly, accounting for all superposed modes, leads to a better understanding of resolution and accuracy of the inversion results.

An inversion scheme based on the observation of an 'effective mode' phase velocity, whilst employing realistic error envelopes, has proved more successful than conventional methods, and demonstrated the need for array length at least 2.5 times the depth of investigation.

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References

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Article Type: Research Article

Keyword(s): engineering; inversion; layered-earth; shear wave; surface waves; synthetic seismograms

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oa Shallow surface wave inversion – research and applications in Western Australia

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