德令哈台竖直摆钻孔倾斜仪观测资料分析

ANALYSIS TO THE DATA OF VERTICAL PENDULUM GROUND TILTMETER IN DELINGHA SEISMIC STATION

选取2014年以来德令哈地震台CZB-1型竖直摆钻孔倾斜仪观测数据,总结了数据的长期和短期变化特征,对影响数据变化的观测系统、场地环境、人为干扰等干扰源进行了分析和研究,并对数据的震前异常和同震响应变化特征进行了分析。以2016年门源6.4级地震和2015年智利8.2级地震为例,分析了钻孔倾斜数据对近震和远震的震前异常、同震响应和震后变化情况。系统整理德令哈地震台钻孔倾斜观测数据记录的2014~2017年的数据,分析数据变化和周围环境干扰的问题,给出初步研究结果。

In this paper,the long-term and short-term variation characteristics of CZB-1 vertical pendulum borehole tilt observation data from Delingha seismic station since 2014 are summarized,the disturbance sources such as observation system,site environment and man-made disturbance are analyzed and studied,and the characteristics of pre-seismic anomaly and co-seismic response of data are analyzed.Taking Menyuan M6.4 earthquake and Chile M8.2 earthquake as examples,the pre-seismic anomalies,co-seismic responses and post-seismic changes of borehole tilt data for near and far earthquakes are analyzed.The data from 2014 to 2017 recorded by borehole tilt observation in Delingha seismic station are systematically collated,and the problems of data change and surrounding environment interference are analyzed.