The Method of Spatially Smoothed Seismicity Parameters in Consideration of Seismotectonic Background and Its Application to Seismic Hazard Estimation

查看全文 作　　者：Zhang [1]Lifang;Lv [1]Yuejun;Peng [1]Yanju;Ma [2]Xiaoling;Cui [2]Manfeng

机构地区：[1]Institute of Crustal Dynamics, China Earthquake Administration;[2]China Earthquake Networks Center

出　　处：《Earthquake Research in China》索引2013年第27卷第1期,共12页

基　　金：funded by the Special Fund for Fundamental Research of Central-level Public Interest Institutions,China(ZDJ2011-13) 摘　　要：In this study, the North China seismic region was selected as the study area, and evaluation of seismic hazard using the spatial smoothing seismicity model was performed. Firstly, the study area is divided into grids, and some parameters (e.g. b-value, M0, Mu, azimuth and M-L relationship) for each seismotectonic model were assigned. Secondly, using elliptical smoothing based on a seismotectonic background model, the statistical earthquake incidence rate in each grid is successively calculated. Lastly, the relevant ground motion attenuation relationship is chosen to assess seismic hazard of general sites. The maps for the distribution of horizontal peak ground acceleration with 10% probability of exceedance in 50 years were obtained by using the seismic hazard analysis method based on grid source. This seismicity model simplifies the methodology of probabilistic seismic hazard analysis, especially appropriate for those places where seismic tectonics is not yet clearly known. This method can provide valuable references for seismic zonation and seismic safety assessment for significant engineering projects. 关键词：地震活动性参数空间平滑危险性估计概率地震危险性分析构造背景地震构造模型地震动衰减关系地震安全性评价

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The Method of Spatially Smoothed Seismicity Parameters in Consideration of Seismotectonic Background and Its Application to Seismic Hazard Estimation

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