NDLI: Path effects and local elastic site amplification: two case studies on Mt Etna (Italy) and Vega Baja (SE Spain)

Content Provider	Springer Nature Link
Author	Scarfi, Lucia Langer, Horst Garcia Fernandez, Maria Jimenez, Maria Jose
Copyright Year	2016
Abstract	Local site effects, normally ground motion amplification, represent one of the main components when developing ground motion simulations and play an important role in the potential earthquake damage. In the framework of the UPStrat-MAFA project a stochastic finite-fault simulation method was selected for the generation of synthetic ground motion scenarios. This method uses spectral site correction functions to account for site amplification effects. These local effects may undergo significant changes due to the source–receiver configuration (i.e., distance, source depth and ray incidence). This holds in particular for reflection and transmission coefficients which may strongly vary depending on the source–receiver geometry, and may alter the characteristics of the spectral site-correction functions. A strategy is proposed to account for local site effects in the context of the regional geological structure, considering SH-waves propagating in a 1D velocity model. Spectral correction functions are derived by comparing Green’s functions obtained for general velocity models and those more detailed at shallow depths. The developed approach is applied in two of the test areas selected in the project, the Mt Etna in Italy and the Vega Baja in SE Spain. The results show the different behaviour in two environments, i.e., volcanic and tectonic, with different seismicity characteristics, and highlight the importance of performing specific site-effect studies in some regions where standard building code soil factors could have some limitations to evaluate the potential for ground motion amplification.
Starting Page	2117
Ending Page	2127
Page Count	11
File Format	PDF
ISSN	1570761X
Journal	Bulletin of Earthquake Engineering
Volume Number	14
Issue Number	7
e-ISSN	15731456
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-02-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Path effects Site amplification Mt Etna Italy Vega Baja Spain Geotechnical Engineering & Applied Earth Sciences Environmental Engineering/Biotechnology Civil Engineering Geophysics/Geodesy Hydrogeology Structural Geology
Content Type	Text
Resource Type	Article
Subject	Building and Construction Geophysics Geotechnical Engineering and Engineering Geology Civil and Structural Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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