Multimode inversion of Rayleigh waves using vertical and horizontal component data

Tatsunori Ikeda, Toshifumi Matsuoka, Takeshi Tsuji, Toru Nakayama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Multimode inversion of surface waves improves S-wave velocity estimations. In surface wave analysis, only vertical components of the P-SV wavefield have been conventionally used to extract multimode Rayleigh waves. In this study, horizontal components of the P-SV waves were analyzed to extract additional mode information of Rayleigh waves. First, we extracted Rayleigh waves from vertical and horizontal components of the numerically synthesized P-SV waves. Additional mode information of Rayleigh waves could be obtained from horizontal component data. We then estimated S-wave velocity structures by multimode inversion using a genetic algorithm. Inclusion of dispersion curves from horizontal component data improved the investigation depth of S-wave velocity estimation. Next, multimode Rayleigh waves were extracted from three-component seismic data acquired in Alberta, Canada. By including dispersion curves from horizontal component data, which have different mode information from those from vertical component data, the inverted S-wave velocity structures agreed well with logging data for deeper layer. Therefore, inclusion of horizontal component data of the P-SV wavefield makes it possible to extract additional mode information of Rayleigh waves, thus eliminating ambiguity from S-wave velocity estimations in multimode inversions.

Original languageEnglish
Title of host publicationSociety of Exploration Geophysicists International Exposition and 83rd Annual Meeting, SEG 2013
Subtitle of host publicationExpanding Geophysical Frontiers
PublisherSociety of Exploration Geophysicists
Pages1782-1787
Number of pages6
ISBN (Print)9781629931883
DOIs
Publication statusPublished - Jan 1 2013
EventSociety of Exploration Geophysicists International Exposition and 83rd Annual Meeting: Expanding Geophysical Frontiers, SEG 2013 - Houston, United States
Duration: Sep 22 2013Sep 27 2013

Publication series

NameSociety of Exploration Geophysicists International Exposition and 83rd Annual Meeting, SEG 2013: Expanding Geophysical Frontiers

Other

OtherSociety of Exploration Geophysicists International Exposition and 83rd Annual Meeting: Expanding Geophysical Frontiers, SEG 2013
CountryUnited States
CityHouston
Period9/22/139/27/13

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All Science Journal Classification (ASJC) codes

  • Geophysics

Cite this

Ikeda, T., Matsuoka, T., Tsuji, T., & Nakayama, T. (2013). Multimode inversion of Rayleigh waves using vertical and horizontal component data. In Society of Exploration Geophysicists International Exposition and 83rd Annual Meeting, SEG 2013: Expanding Geophysical Frontiers (pp. 1782-1787). (Society of Exploration Geophysicists International Exposition and 83rd Annual Meeting, SEG 2013: Expanding Geophysical Frontiers). Society of Exploration Geophysicists. https://doi.org/10.1190/segam2013-0200.1