利用静态、动态应力降比值判断东北地震震后趋势

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.