华北地区地震短期异常分析及其前兆信息量的提取与计算  

Analysis on the short-term anomalies of earthquake in North China and the extraction of their precursory information

作　　者：平建军[1] 张永仙[2] 张清荣[1] 陈建国[1] 黄万发[1] 

机构地区：[1]河北省地震局,河北石家庄050021 [2]中国地震局分析预报中心,中国北京100036

出　　处：《华北地震科学》2003年第3期1-7,47,共8页North China Earthquake Sciences

基　　金：国家"十五"科技攻关项目(2001BA601B01-01-04)部分研究成果.

摘　　要：参考一些先前的研究结果,系统分析了1980年以来华北地区(34°～42°N、108°～124°E,下同)大量的各种前兆观测数据资料。根据每一观测资料的映震情况,确定114项资料为华北地区骨干前兆观测资料,并依此为基础,研究了华北地区地震短期前兆异常的主要特征及其识别方法;结合"九五"攻关的研究成果,进一步给出了提取华北地区地震短期异常前兆信息量的方法。经实际应用计算表明,该方法不仅可使各种前兆观测资料短期异常变化的量纲得到转化统一,而且可更加客观自然地描述地震前兆观测资料的短期异常变化,这就为深入开展地震综合分析预测奠定了较好的基础。Based on some previous study, a large number of precursory data observed in North China (34°～42°N,108°～124°E) since 1980 were systematically analyzed. According to the ability reflecting earthquakes, 114 items of the data are confirmed as main precursory data in North China. On the basis of above, the main characteristics of shortterm precursory anomalies in North China as well as their recognition are studied, and the method to extract precursory information from shortterm anomaly in North China area is presented. The application shows that this method not only can unify the dimensions of various shortterm precursory anomalies, but also can reflect their shortterm variation objectively.

关 键 词：华北地区 地震短期异常 前兆信息量 

分 类 号：P315.63[天文地球—地震学]