地震危险度D值在华北中强以上地震前的中期异常变化  

THE MEDIUM TERM ANOMALY VARIATION OF SEISMIC RISK DEGREE D VALUE BEFORE MODERATE STRONG EARTHQUAKES IN NORTH CHINA

作　　者：戴维乐[1] 王炜[1] 宋俊高[1] 周云好[1] 

机构地区：[1]安徽省地震局

出　　处：《西北地震学报》1997年第2期1-6,共6页Northwestern Seismological Journal

摘　　要：用１９７２～１９９２年期间华北地区地震资料对地震危险度Ｄ值进行了空间扫描．结果表明，大部分中强以上地震前２～３ａ，在未来震中周围出现较大范围的Ｄ值中期异常区域．文中就Ｄ值用于中期预报的方法、预报效能、Ｄ值与实际地震活动的关系。The seismic data from 1972 to 1992 in North China are used in spacial scanning of seismic risk degree D value in this paper.The result shows that there are large anomaly zones of D value around the future epicenter about 3 years before most moderate strong earthquakes.In this paper,the method using D value in medium term earthquake prediction,prediction ability,the relation of D value to real seismicity and the stability of computation are also discussed.

关 键 词：中期异常 地震预报 地震危险度 D值 地震前兆 

分 类 号：P315.7[天文地球—地震学]