震源区构造对地震学参数扫描结果的影响分析  

ANALYSIS OF IMPACT OF SOURCE REGION STRUCTURE ON SEISMOLOGY PARAMETER SCAN RESULTS

作　　者：陈宇卫[1] 黄显良[1] 王行舟[1] 沈小七[1] 缪鹏[1] 陈安国[1] 何康[1] 李发[1] 

机构地区：[1]安徽省地震局,合肥230031

出　　处：《地震地质》2009年第3期433-440,共8页Seismology and Geology

基　　金：国家科技支撑计划子专题(2006BAC01B020105);安徽省科技攻关计划(08010302204)资助

摘　　要：以华南、华北以及西部地区中强地震为例,选择了8种物理意义明确、独立性较强的地震学指标,以区域内断裂走向为参考,分别沿断裂走向进行平行、垂直、斜向滑移做空间扫描,以扫描曲线与震源区曲线的相关系数大小定量分析不同滑移方式扫描结果的差异,研究不同构造分区内断裂走向对地震学参数扫描结果的影响及变化规律。结果表明:不仅空间参数的改变对结果有影响,震源区内的断裂走向对地震学参数扫描结果也有一定影响。文中给出了不同震级地震学指标在扫描中影响最小的空间范围的最佳条件参数,同时也对不同断裂走向对参数扫描结果可能产生的影响进行了分析。By taking medium-strong earthquakes of South China,North China and western China as the research objects,this paper selects 8 kinds of seismology indexes with clear physical meaning and strong independence to carry out spatial scans of the parallel slip ,vertical slip and oblique slip along the fault strike,respectively. Based on the size of correlation coefficients between scanning curve and source region curve, we analyze quantitatively the difference of scan results of different slip modes and study the impact of fault strike in different tectonic divisions on seismology parameters scanning results and variation rules. The results show that not only the change of spatial parameters has great influence on the seismological parameters scan,but also the fault strike in source region. This paper presents the optimum condition parameters with least influence space scope in scanning for different magnitude seismology indexes and analyzes the possible influence of fault strike on scanning results of seismology parameters.

关 键 词：地震学指标 构造分区 断裂走向 相关系数 

分 类 号：P315.33[天文地球—地震学]