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Descripción
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| It is known that the introduction of faults as independent seismic sources in hazard assessment has a great impact on the results, with respect to those obtained with classical zoning methods (CZM). Although at the moment there are no widely contrasted methodological developments to combine zones and faults in the source models, some approaches that have used hybrid models (HM), such as that proposed by Rivas-Medina et al., (2019) aim to obtain expected values of the ground motion parameters, in the environment of the faults, which double (on average) those obtained by zoned models, according with observations in recent earthquakes. This fact has a great impact on the hazard and seismic risk results that can be obtained in populations close to active faults . In this paper, we analyze the influence of fault modeling as independent sources in three cities in the south and southeast of Spain, specifically in Malaga, Granada and Murcia. First, we compare the hazard results obtained (curves and response spectra) in the three cities by both methods, CZM and HM. Afterwards, the faults that contribute most to the hazard for different return and structural periods are identified and the control earthquakes or dominant seismic scenarios are established by disaggregation procedure. And finally the expected ground motion parameters due to these seismic scenarios are estimated. The main results for return period 475 years are that the dominant faults turn out to be Mijas (in Málaga), Fargue-Jun (Granada) and Alhama de Murcia, Bajo Segura and Carrascoy ( in Murcia). The control earthquakes in general correspond to the ranges of magnitude Mw (5.5 - 6.0), in the three cities, and distances Rrup (15-20 km) in Malaga and from (5-10 km) in Granada and Murcia, which implies expected accelerations of the order of 0.13 g in the first city and 0.35 g in the last two, considering in all cases generic sites in rock. | |
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Internacional
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Si |
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Nombre congreso
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4TH FAULT2SHA WORKSHOP |
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Tipo de participación
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970 |
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Lugar del congreso
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Barcelona |
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Revisores
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Si |
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ISBN o ISSN
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0-0000-000-00 |
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DOI
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Fecha inicio congreso
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03/06/2019 |
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Fecha fin congreso
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05/06/2019 |
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Desde la página
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1 |
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Hasta la página
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1 |
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Título de las actas
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4TH FAULT2SHA WORKSHOP |