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.
出处
《地震》
CSCD
北大核心
1998年第2期206-210,共5页
Earthquake
关键词
地磁幅相法
临震标志
标准值
Z分量
地震前兆
Geomagnetic amplitude phase, Imminent index, Detrending, Standard value
