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Earth, Planets and Space
Fig. 12 | Earth, Planets and Space

Fig. 12

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. 12

Beligna#1 HS (active) data: comparing traces and amplitude spectra for the central (HS1) and western (HS2) sites (same source, stack and offset—see map in Fig. 8a and trace comparison in Fig. 11): a seismic traces and amplitude spectra (arbitrary unit) for HS1; b seismic traces and amplitude spectra for HS2 [vertical scale adapted to meet the actual data amplitudes for each site]; c comparison of the amplitude spectra of the R and T components while using the same vertical scale so to allow a clearer comparison of the data amplitudes for the central (HS1) and western (HS2) data. Due to the larger attenuation, the amplitude of the HS2 traces is considerably lower and the peak value migrates toward lower frequencies (high frequencies suffer from higher attenuation)

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