地磁Z分量幅相法临震标志体系  

THE IMMINENT INDEX OF AMPLITUDE-PHASE METHOD OF GEOMAGNETIC Z COMPONENT

作　　者：冯志生[1] 王建宇[1] 蒋延林[1] 庄明龙[1] 吴火林 李杏元 

机构地区：[1]江苏省地震局,中国南京210014 [2]南京地震台,中国南京210014 [3]溧阳地震台,中国江苏213300

出　　处：《地震》1998年第2期206-210,共5页Earthquake

摘　　要：应用连云港台和溧阳台 7a以上的地磁 Z分量日变资料及其间江苏地区 ML 5 .0以上地震 ,提取了线性去倾及二次去倾消除年变的幅相法临震标志体系。分析认为上述标志体系与原有的方法比较 ,具有异常判别受人为因素影响小的优点 ,但须进一步降低虚报率。By using the daily variation data of geomagnetic Z component for seven years at Lianyungang station and Liyang station, and the earthquakes with M L >5.0 in Jiangsu Province, we get the imminent index of amplitude phase method that eliminated the annual variation with a linear detrending and twice detrending. The analysis shows that the above mentioned index system has the advantage of less influenced of man made factors on anomaly judgement, compared with the existing method.However it is necessary to decrease the false prediction ratio.

关 键 词：地磁幅相法 临震标志 标准值 Z分量 地震前兆 

分 类 号：P315.7[天文地球—地震学]