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Earth, Planets and Space
Fig. 14 | Earth, Planets and Space

Fig. 14

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. 14

Beligna#1—western area (HV2): directivity of the Horizontal-to-Vertical Spectral Ratio obtained from microtremor data (see also the average curve shown in Fig. 15c): the centre of the circle represents 0.3 Hz and the external circumference 19 Hz (for the joint analysis with the dispersion data we considered only the lower frequencies—see text for further comments)

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