Inversion of high frequency surface waves with fundamental and higher modes

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Addressing non‐uniqueness in linearized multichannel surface wave inversion (2009, background): “Higher mode dispersion curves may constitute an independent set of observations, which improves the results of the inversion process (Xia et al. 2003) and it is desirable to include this additional information, if available, in the inversion process.”
Exploring the model space and ranking a best class of models in surface-wave dispersion inversion: Application at European strong-motion sites (2012, unknown): “We consider higher modes in the inversion to increase the reliability of the inverted model (Xia et al., 2003).”
An improved vacuum formulation for 2D finite-difference modeling of Rayleigh waves including surface topography and internal discontinuities (2012, methodology): “Dispersive Rayleigh waves have been widely employed to estimate S-wave velocities in shallow layers (Nazarian and Stokoe, 1984; Xia et al., 1999, 2003, 2004, 2006; Calderón-Macías and Luke, 2007; Luo et al., 2009a; Socco et al., 2010).”