Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7917
AuthorsConvertito, V.* 
Herrero, A.* 
TitleInfluence of focal mechanism in probabilistic seismic hazard analysis
Issue DateDec-2004
Series/Report no.6/96 (2004)
DOI10.1785/0120040036
URIhttp://hdl.handle.net/2122/7917
KeywordsSeismic hazard; Focal mechanism; Ground motion predictive equations
Subject Classification04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk 
AbstractAn extension of probabilistic seismic hazard analysis is proposed to introduce a priori information about seismic source parameters. In particular, faulting style is taken into account with a theoretical corrective coefficient applied to the attenuation law. The validity of this correction is assessed through a comparison with observed data, attenuation law predictions corrected and not corrected, and the results of attenuation laws containing faulting style parameters. The probabilistic nature of the analysis is maintained, introducing into the classical hazard formulation a 2D probability density function describing the most probable focal mechanisms associated with each seismic source zone. This new expression may also be used in the framework of deaggregation analysis. Thus, the design earthquake resulting from the deaggregation is characterized by a focal mechanism. An application to a site located in the Southern Apennines, Italy, is shown. The result of the analysis emphasizes the importance of strike-slip events in the seismic hazard context, compared with normal faulting seismic activity in this region.
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