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HVSR, Amplifications and ESAC: Some Clarifications

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Efficient Joint Analysis of Surface Waves and Introduction to Vibration Analysis: Beyond the Clichés

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Abstract

This chapter discusses some points regarding two classical passive techniques more and more popular in seismic micro-zonation studies: the Horizontal-to-Vertical Spectral Ratio (HVSR) and the ESAC (Extended Spatial AutoCorrelation), a sort of “generalized” SPAC (SPatial AutoCorrelation). The influence of industrial components on the HVSR, the role of Love waves in the HVSR modelling and few more important issues are illustrated. Furthermore, the idea that the HVSR curve represents the so-called site amplification is discussed also in the light of experimental data based on the computation of the SSR (Standard Spectral Ratio). A series of recommendations about the analysis and modelling of the effective dispersion curve retrieved from ESAC (a methodology that provides a dispersion curve much clearer with respect to the ReMi (Refraction Microtremor) technique) are then reported together with some concrete examples.

Mirrors should reflect a little before throwing back images.

Jean Cocteau

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Authors and Affiliations

  1. Institute of Rock Structure and Mechanics, Academy of Sciences of the Czech Republic, Prague, Czech Republic

    Giancarlo Dal Moro

  2. Eliosoft, Udine, Italy

    Giancarlo Dal Moro

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  1. Giancarlo Dal Moro
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Correspondence to Giancarlo Dal Moro .

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Dal Moro, G. (2020). HVSR, Amplifications and ESAC: Some Clarifications. In: Efficient Joint Analysis of Surface Waves and Introduction to Vibration Analysis: Beyond the Clichés . Springer, Cham. https://doi.org/10.1007/978-3-030-46303-8_3

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