西藏地区VP型垂直摆倾斜仪观测数据质量及干扰分析  

ANALYSIS ON OBSERVATIONAL DATA QUALITY AND INTERFERENCE ON VERTICAL PENDULUM TILTMETER IN TIBET

作　　者：多布拉 次旦卓玛 洛桑罗布 甘茂 黄涛 格桑卓玛 Duobula;Cidanzhuoma;Luosangluobu;GAN Mao;HUANG Tao;Gesangzhuoma(Earthquake Agency of Tibet Autonomous Region,Lhasa 850000,China)

机构地区：[1]西藏自治区地震局,西藏拉萨850000

出　　处：《高原地震》2022年第3期65-72,共8页Plateau Earthquake Research

基　　金：中国地震局监测、预报、科研三结合课题(项目编号:3JH-2021047)资助

摘　　要：收集了2017~2021年西藏自治区拉萨地震台、狮泉河地震台VP型宽频带垂直摆倾斜仪观测资料,与正常时段呈现的光滑连续、清晰均匀、日变周期明显的曲线进行对比分析。结果表明:拉萨地震台、狮泉河地震台宽频带倾斜仪观测主要受雷电、气压、降雨、风扰及一些人为因素影响,观测曲线出现不同程度的固体潮畸变。其中,受气压和风扰影响较多,观测曲线表现为固体潮抖动畸变、毛刺或增粗。综上,对干扰进行识别和排除,可进一步提高观测资料质量,为震兆异常提供有效参考。In this paper,the observation data of VP type broadband vertical pendulum tiltmeter at Lhasa seismic station and Shiquanhe seismic station in Tibet Autonomous Region from 2017 to 2021 is collected.It is compared and analyzed with the data of the smooth continuous,clear and uniform curve with the obvious daily variation period presented in normal period.The result shows that observational data quality of the broadband tiltmeter at Lhasa seismic station and Shiquanhe seismic station is mainly affected by the factors such as lightning,air pressure,rainfall,wind disturbance and some human disturbance.And the observation data shows different degrees of solid tide distortion.It is more affected by air pressure and wind disturbance,which the observation curve shows solid tide with distortion,burr and thickening.In conclusion,the quality of observation data has improved by identifying and eliminating interference factors,and provided an effective reference for earthquake precursor anomalies.

关 键 词：倾斜仪 VP 固体潮汐 干扰 

分 类 号：P315.62[天文地球—地震学]