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The Spatial Cross-Correlation Method for Dispersive Surface Waves
Geophysical Journal International
  • Andrew P. Lamb, Boise State University
  • Kasper van Wijk, University of Auckland
  • Lee M. Liberty, Boise State University
  • T. Dylan Mikesell, Massachusetts Institute of Technology
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Dispersive surface waves are routinely used to estimate the subsurface shear-wave velocity distribution, at all length scales. In the well-known Spatial Autocorrelation method, dispersion information is gained from the correlation of seismic noise signals recorded on the vertical (or radial) components. We demonstrate practical advantages of including the cross-correlation between radial and vertical components of the wavefield in a spatial cross-correlation method. The addition of cross-correlation information increases the resolution and robustness of the phase velocity dispersion information, as demonstrated in numerical simulations and a near-surface field study with active seismic sources, where our method confirms the presence of a fault-zone conduit in a geothermal field.
Copyright Statement

This article has been accepted for publication in Geophysical Journal International ©: 2014, The Authors. Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved.

Citation Information
Andrew P. Lamb, Kasper van Wijk, Lee M. Liberty and T. Dylan Mikesell. "The Spatial Cross-Correlation Method for Dispersive Surface Waves" Geophysical Journal International (2014)
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