摘要
本文将华北地区1990年10月—1991年4月地磁核旋定点观测数据利用加权差分法和带通滤波处理提取地震磁效应。发现1991年3月26日山西大同发生Ms5.8级地震的地磁前兆异常和同震异常现象。
The weighted difference method and band-pass filtering are applied to theproton precession magnetometer data of October 1990 to April 1991 in North Ghina. The geomagnetic precursor and co-seismic anomalies in tne geomagnetic vertical intensity are found at stations near the epicenter of the march 26,1991, Ms 5.8 Datong, Shanxi earthquake.
出处
《地震地磁观测与研究》
1992年第2期44-52,共9页
Seismological and Geomagnetic Observation and Research
关键词
地震
磁效应
加权差分法
带通滤波
Seismoniagnetic effect
Precursor anomaly
co-seismic anomaly
Weighted difference method
Band-pass filtering
