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Earth, Planets and Space
Fig. 11 | Earth, Planets and Space

Fig. 11

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. 11

Beligna#1. Comparison of the HS (active) seismic traces (Z, R and T components) for the central (HS1) and western (HS2) sites (see map in Fig. 8a) [offset is 35 m for both the data sets and the source is the same—see Table 1]. Seismic traces show major differences between the two sites [HS1—black line; HS2—yellow line]: compared to HS2, HS1 signals are faster and have a larger amplitude (i.e., undergo less attenuation). These two facts provide an instantaneous evidence that, compared to the western area [HS2], in the central area (the residual sandy paleo-dune) the surficial sediments are significantly stiffer. To improve data readability, the vertical scales of the three components are different. See also traces and amplitude spectra shown in Fig. 12

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