Fig. 7

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Observed and modeled Rayleigh wave phase velocity dispersion curves at the intersection between slices AB, CD, EF, GH and IJ (see Fig. 5). mprior: model obtained from the point-wise inversion (step 1). m0: smoothed version of the prior model, used to start the 3-D optimization (step 2); msol: solution of the 3-D optimization.

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