临汾台垂直摆倾斜仪NS分量异常原因分析

Anomaly analysis of NS component of vertical pendulum inclinomenter at Linfen seismostation

为核实临汾台垂直摆倾斜仪NS分量异常的原因,对临汾垂直摆观测系统、观测环境等现场情况和气象三要素资料进行了分析,并重点利用固体潮振幅比和频谱分析方法对异常数据进行了对比分析,综合认为引起垂直摆倾斜仪NS分量异常变化的原因是由于仪器摆体存在故障,属于非地震前兆异常。

In order to verify the abnormal reason of NS component of vertical pendulum inclinometer at Linfen seismostation,the observation system of vertical pendulum and observation environment and meteorological data of Linfen are analyzed in this paper.In addition,the comparison and analysis of abnormal data are carried out by means of amplitude ratio and spectral analysis.It is generally believed that the reason for the abnormal change of NS component of vertical pendulum inclinometer is the fault of the instrument,is a non-seismic precursor anomaly.