基于中小地震应变能密度的地震活动性图像分析  

Analysis of Seismological Energy Density of Minor-moderate Earthquakes

作　　者：张力方[1] 吕悦军[1] 彭艳菊[1] 谢卓娟 

机构地区：[1]中国地震局地壳应力研究所,北京市德外西三旗100085

出　　处：《中国地震》2008年第4期407-414,共8页Earthquake Research in China

基　　金：国家科技支撑计划项目子专题(2006BAC13B01-0304)资助

摘　　要：当前的地震活动图像分析方法未能充分利用大量的中小地震观测资料。本文提出中小地震能量密度值的定义及计算方法,以华北地区为研究区域,利用1970～2006年ML2.0～4.0地震资料,计算了中小地震能量密度图像,初步分析了中小地震活动的时空迁移特性,以及中小地震能量密度图像变化与强震的关系。该方法为地震危险区圈定、地震活动性参数确定、历史强震参数复核等提供了一种可能的工具。One of the failures in present seismic pattern analysis is the inadequate use of minormoderate earthquake data. The authors present a new parameter, the density of minor-moderate earthquake energy, and its calculation method. We take North China as a study region, and calculate the distribution of earthquake energy density on the basis of the earthquake data of ML2.0 - 4.0 from 1970 to 2006 and make a preliminary analysis of the spatial-temporal migration characteristics of minor to moderate earthquakes and the relationship between the change of minor-moderate earthquake energy density and the strong earthquakes. The results prove that this method can be used to the delineation of seismic risk zone, the determination of seismic parameters and the rechecking of historical earthquake parameters.

关 键 词：中小地震 能量密度 应变能释放 华北地区 

分 类 号：P315[天文地球—地震学]