浚县地震台地磁秒采样数据高频干扰分析

High-frequency interference analysis of geomagnetic second sampling data at Xunxian Seismic Station

为识别及分析浚县地震台地磁秒采样观测数据中的高频干扰成分,采用别尔采夫滤波剔除其日波及半日波,然后通过时频分析得到高频干扰时段。通过查询工作日志及进行毕奥萨伐尔定律分析,认为浚县地震台地磁秒采样数据所受高频干扰除磁暴外,主要来自电焊施工和雷电,同时发现2种干扰类型有不同的典型干扰形态。

In order to identify and analyze the high-frequency interference components in the geomagnetic second sampling data of Xunxian Seismic Station,the daily and semi diurnal waves are eliminated by Berzev filter,and then the high-frequency interference period is obtained by time-frequency analysis.Then,through querying the work log and analyzing by Biot-Sava law,it is considered that the high-frequency interference of geomagnetic second sampling data of Xunxian Seismic Station mainly comes from electric welding construction and lightning around the station,in addition to magnetic storm.At the same time,it is found that the two interference types have different typical interference forms,which can provide experience for the interference discrimination of geomagnetic stations in the future.