徐州地震台VP型宽频带倾斜仪观测数据干扰分析

Interference analysis of VP broadband tiltmeter data at Xuzhou Seismic Station

通过分析徐州地震台VP型宽频带倾斜仪2017—2019年的观测资料,研究日常观测所受干扰特征,将降雨干扰、气压干扰、雷暴干扰特征和规律进行逐一分析。降雨是徐州地震台VP型宽频带倾斜仪的主要干扰源,定量分析降雨干扰,结果表明,EW分量降雨响应更灵敏。雷电干扰对于VP型宽频带倾斜仪危害极大。对观测场地附近的场地环境干扰进行分析认为,作为短基线设备,VP型宽频带倾斜仪对于高频冲击以及强振动干扰响应较为灵敏。定量分析载荷影响的结果表明,理论计算结果与实际观测数据较为吻合。

By analyzing the observation data of the VP broadband tiltmeter at Xuzhou Seismic Station from 2017 to 2019,the characteristics of several interferences in daily observation are studied and the characteristics and rules of rainfall interference,atmospheric pressure interference and thunder storm interference are analyzed one by one.Rainfall is the main interference source of the VP broadband tiltmeter at Xuzhou Seismic Station.The quantitative analysis of rainfall interference shows that the EW component is more sensitive to rainfall.Lightning interference is very harmful to VP broadband tiltmeter.The site environmental interference near the observation site is analyzed,and it is considered that the VP broadband tiltmeter is a short baseline equipment,which is relatively sensitive to the interference of high-frequency impact and strong vibration.The result of quantitative analysis of the load effect shows that the theoretical calculation results are in good agreement with the actual observation data.