利用静态、动态应力降比值判断东北地震震后趋势  

Using the static and dynamic stress drop ratio to judge the trend of the aftershock in Northeast China

作　　者：孙强 李继业 武晓军 王强 邹志超 孙伟 

机构地区：[1]哈尔滨市阿城地震台,中国黑龙江150321 [2]哈尔滨市防震减灾技术中心,中国黑龙江150021 [3]哈尔滨市通河地震台,中国黑龙江150021

出　　处：《地震地磁观测与研究》2015年第2期13-18,共6页Seismological and Geomagnetic Observation and Research

基　　金：中国地震局地震科技星火计划项目(XH12015Y)

摘　　要：统计分析2005年以来黑龙江及周边地区中强地震的频谱特征,分别计算各地震的应力降,利用静态与动态应力降比值,判断该区中强地震震后趋势。研究发现,2005年以来该区中强震Y值较大,在0.3—0.6,以孤立型地震为主。After finishing the statistics analysis of spectrum characteristics for moderately strong earthquakes in Heilongjiang Province,it comes to the value of stress drop. UsingY value,the ratio of the static stress drop and dynamic stress drop,the article discuss the aftershock trend judgment. The ratio of the static stress drop and dynamic stress drop is between 0.3 and 0.6 since 2005 in Heilongjiang Province,which is larger than normal. The earthquake type gives priority with the isolated earthquake.

关 键 词：频谱特征 静态应力降 动态应力降 地震类型 震后趋势判断 

分 类 号：P315[天文地球—地震学]