考虑俯冲带潜在震源区的地震危险性算法研究及在中国海域的应用  

Study on Seismic Hazard Assessment Algorithm Considering Seismogenic Sources of Subduction Zones and Its Application on Chinese Marine Territory

作　　者：李昌珑[1,2] 温增平 Li Changlong;Wen Zengping(Institute of Geophysics,China Earthquake Administration,Beijing 100081,China;Urumqi Institute of Central Asia Earthquake,China Earthquake Administration,Urumqi 830011,China)

机构地区：[1]中国地震局地球物理研究所,北京100081 [2]中国地震局乌鲁木齐中亚地震研究所,乌鲁木齐830011

出　　处：《震灾防御技术》2021年第1期62-70,共9页Technology for Earthquake Disaster Prevention

基　　金：国家重点研发计划(2017YFC1500405);中国地震局地球物理研究所基本科研业务费专项(DQJB21Z15)。

摘　　要：本文研究了俯冲带潜在震源区离散化方法及考虑俯冲带高震级地震震源破裂面和震源深度的场点地震动计算方法,推导了俯冲带潜在震源区地震危险性计算公式,并使用中国海域及邻区地震危险性模型进行地震危险性试算。结果表明,本文建立的考虑俯冲带潜在震源区的地震危险性算法能够实现场点地震危险性计算时对俯冲带高震级地震震源破裂面和震源深度的考虑。This paper studies the discretization method of the seismogenic sources of the subduction zone and the ground motion calculation method considering the source rupture surface and focal depth of the high-magnitude earthquakes in the subduction zone.The calculation formula for the seismic hazard of the seismogenic sources of the subduction zone is derived,and the preliminary seismic hazard calculation for Chinese marine territory is tested.The main conclusions are:the seismic hazard algorithm established in this paper considering the seismogenic sources of the subduction zone can realize the consideration of the source rupture surface and focal depth of the high-magnitude earthquake in the subduction zone in the seismic hazard calculation of the site.

关 键 词：地震危险性 地震区划 海域地震 俯冲带 三维潜源 

分 类 号：P315.9[天文地球—地震学]