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Earth, Planets and Space
Fig. 21 | Earth, Planets and Space

Fig. 21

From: Tools for the efficient analysis of surface waves from active and passive seismic data: exploring an NE-Italy perilagoon area with significant lateral variations

Fig. 21

Close up of the T-component passive data in the transition zone, where the stiff sandy sediments of the residual dune give way to softer sediments (inline positions 86–108 m in Fig. 20c): a normalized amplitude spectra (15% spectral smoothing); b spectral ratios with respect to the first channel; c standard deviations of the original (unfiltered) traces; d standard deviations of the traces filtered with a 5.7 Hz Gaussian filter. See text for comments

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