Multimode inversion of Rayleigh waves using vertical and horizontal component data

Tatsunori Ikeda, Toshifumi Matsuoka, Takeshi Tsuji, Toru Nakayama

    研究成果: Chapter in Book/Report/Conference proceedingConference contribution

    抄録

    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.

    本文言語英語
    ホスト出版物のタイトルSociety of Exploration Geophysicists International Exposition and 83rd Annual Meeting, SEG 2013
    ホスト出版物のサブタイトルExpanding Geophysical Frontiers
    出版社Society of Exploration Geophysicists
    ページ1782-1787
    ページ数6
    ISBN(印刷版)9781629931883
    DOI
    出版ステータス出版済み - 2013
    イベントSociety of Exploration Geophysicists International Exposition and 83rd Annual Meeting: Expanding Geophysical Frontiers, SEG 2013 - Houston, 米国
    継続期間: 9 22 20139 27 2013

    出版物シリーズ

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

    その他

    その他Society of Exploration Geophysicists International Exposition and 83rd Annual Meeting: Expanding Geophysical Frontiers, SEG 2013
    Country米国
    CityHouston
    Period9/22/139/27/13

    All Science Journal Classification (ASJC) codes

    • Geophysics

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