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Macroseismic Intensity Modelling of Earthquakes in Southern Spain: Attenuation and Tectonic Implications

机译:西班牙南部地震的宏观地震烈度建模:衰减和构造意义

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摘要

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.
机译:提出了一个在西班牙南部观测到的历史地震和仪器地震的宏观地震烈度模型,目的是确定一个区域的地震危险性评估中的宏观地震参数,在该区域中,地震事件的强度分布表征显示出不同的难度水平。研究区域的复杂断层系统。所采用的程序允许对地震的震中和主要衰减方向进行分析确定,并分别参照该区域的最大震荡面积和结构构造,进行双重验证。因此,在适当数量的事件上进行的分析强调了一些要素,这些要素是根据地震的地震烈度分布与相应结构框架之间的一致性来初步表征地震分区的。

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