Macroseismic Intensity Modelling of Earthquakes in Southern Spain: Attenuation and Tectonic Implications |
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Authors: | Tiziana Tuvè Antonio Teramo Jesus Ibañez Carla Bottari Domenica Termini |
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Affiliation: | (1) Osservatorio Sismologico, Università di Messina, Via Osservatorio, 4 - 98121 Messina, Italy;(2) Instituto Andaluz de Geofisica, Universidad de Granada, Campus de Cartuja s/n 18071, Granada, Spain |
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Abstract: | A modelling of the observed macroseismic intensity of historical and instrumental earthquakes in southern Spain is proposed, with the aim of determining the macroseismic parameters for seismic hazard evaluation in a region in which the characterization of intensity distribution of seismic events shows different levels of difficulty referable to the complex faults system of the area in study. The adopted procedure allows an analytical determination of epicenters and principal attenuation directions of earthquakes with a double level of verification with reference to the maximum shaking area and structural lineaments of the region, respectively. The analyses, carried out on a suitable number of events, highlight, therefore, some elements for a preliminary characterization of a seismic zonation on the basis of the consistency between seismic intensity distribution of earthquakes and corresponding structural framework. |
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Keywords: | Attenuation directions southern Spain macroseismic intensity virtual intensity |
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