Estimating Cross-Coupling in Site Response by Seismic Noise Interferometry: An Example from an Alpine Valley (Northeastern Italy)
| Autor: | Stefano Parolai, Giovanna Laurenzano, Marco Garbin |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Seismological Research Letters. 94:140-148 |
| ISSN: | 1938-2057 0895-0695 |
| DOI: | 10.1785/0220220099 |
| Popis: | The assessment of site response is an important task for improved seismic hazard estimation. The standard tools and approaches, however, generally neglect the cross-coupling effect among the three components of motion due to heterogeneities in the underground structure. In this study, we propose a means to estimate cross-coupling effects by the inversion of the deconvolved wavefield derived from seismic noise analysis. These functions are obtained by deconvolving the three components of the ground motion recorded at a site with those recorded at a reference site. The proposed procedure is applied to a set of recordings collected in the Sarca Valley (northeastern Italy) by a temporary seismometric network. The results show that the cross-coupling components are not negligible, and are related to lateral variations in the bedrock surface and heterogeneities within the sedimentary cover. |
| Databáze: | OpenAIRE |
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