乾陵地震台DSQ型水管倾斜仪观测数据常见干扰分析

Interference analysis of DSQ water-tube tiltmeter at Qianling Seismic Station

根据地球物理数据跟踪分析方法,对乾陵地震台DSQ型水管倾斜仪观测资料常见干扰进行分析,发现:观测数据主要受观测系统故障、自然环境因素和人为干扰影响,在曲线形态上表现为毛刺、高频扰动、趋势倾斜等;大风、降雨对水管倾斜仪NS分量干扰幅度明显较大,可能与NS、EW分量所在处洞顶覆盖层厚度不同有关。通过对以上干扰特征的认识,可为观测资料预处理及应用提供参考。

Using the methods of geophysics data tracking analysis,common interference of DSQ type water-tube tiltmeter observation data at Qianling Seismic Station is analyzed.The results show that the interference on observations mainly appeared as burr,high frequency disturbance,and trend inclination.The disturbance amplitude on the NS component of the water-tube tiltmeter observations caused by the strong wind and rainfall is obviously larger,which may be related to the different thicknesses of the cover layer of the cave roof where the NS and EW components are located.Through the recognition of the above interference characteristics,it can provide reference for the observation data preprocess and application.