1887
Volume 37, Issue 1
  • ISSN: 0812-3985
  • E-ISSN: 1834-7533

Abstract

In this study, we propose a joint inversion method, using genetic algorithms, to determine the shear-wave velocity structure of deep sedimentary layers from receiver functions and surfacewave phase velocity. Numerical experiments with synthetic data indicate that the proposed method can avoid the trade-off between shear-wave velocity and thickness that arises when inverting the receiver function only, and the uncertainty in deep structure from surface-wave phase velocity inversion alone. We apply the method to receiver functions obtained from earthquake records with epicentral distances of about 100 km, and Rayleigh-wave phase velocities obtained from a microtremor array survey in the Kanto Plain, Japan. The estimated subsurface structure is in good agreement with the previous results of seismic refraction surveys and deep borehole data.

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2006-03-01
2026-01-13

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  • Article Type: Research Article
Keyword(s): genetic algorithms; joint inversion; microtremor array survey; phase velocity; receiver function; sedimentary layer; surface wave

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