基于潜在破裂面源模型的南北地震带南段地震区划研究  

Seismic Zoning in Southern Part of North-South Seismic Belt Based on the Potential Rupture Surface Source Model

作　　者：胥广银[1] 高孟潭[1] Xu Guangyin Gao Mengtan(Institate of Geophysics, China Earthquake Administration, Beijing 100081, China)

机构地区：[1]中国地震局地球物理研究所,北京100081

出　　处：《震灾防御技术》2017年第3期441-455,共15页Technology for Earthquake Disaster Prevention

基　　金：中国地震局地球物理研究所中央级公益性科研院所基本科研业务专项(DQJB11C19);中国地震局中印联合科技项目"喜马拉雅地区统一地震目录和地震区划图联合编制"共同资助

摘　　要：南北地震带南段大震活动频繁。已有的研究结果表明,大震近场范围场点的地震危险性与地震破裂面产状及其尺度密切相关。因此,在南北地震带南段需要考虑潜在震源三维特征进行地震危险性分析和地震区划研究。本文在充分搜集大震发震构造资料的基础上,在南北地震带南段构建了考虑震源尺度和产状的潜在震源模型,改进了地震危险性概率分析方法,进而对该地区进行地震区划研究。结果表明,考虑潜在震源三维特征的地震危险性分析结果可以有效地反映南北地震带南段发震构造的产状和尺寸特征,提高地震区划结果的合理性。There are many large earthquake actives recorded in the southern part of North-South seismic belt. The seismic hazard near the potential large earthquake source is related to size and attitude of potential ruptures according to the recent studies. So, the 3-D characteristics of potential sources should be considered to analyze the seismic hazard near the large faults that have the possibility to generate great earthquakes. In this study, the plenty of data of strong earthquake and seismo-tectonics are collected and the potential rupture surface source model are constructed to consider the size and attitude of large earthquakes, in order to make the seismic hazard analysis results more reasonable in the southern part of North-South seismic belt. From this study, we conclude that the seismic zoning results show the spatial characteristic, such as attitude and size of seismogenic structures, so it makes the results of the seismic hazard analysis and seismic zoning more reasonable in the southern part of North-South seismic belt.

关 键 词：南北地震带南段 潜在地震破裂面源模型 地震危险性分析 地震区划 

分 类 号：P315[天文地球—地震学]