李惠玲,张明,范晓易,等. 不同型号摆式倾斜仪观测资料的一致性分析[J]. 华北地震科学,2022, 40(4):59-68. doi:10.3969/j.issn.1003−1375.2022.04.009.
引用本文: 李惠玲,张明,范晓易,等. 不同型号摆式倾斜仪观测资料的一致性分析[J]. 华北地震科学,2022, 40(4):59-68. doi:10.3969/j.issn.1003−1375.2022.04.009.
LI Huiling,ZHANG Ming,FAN Xiaoyi,et al. Consistency Analysis of Observation Data from Different Types of Pendulum Tiltmeters[J]. North China Earthquake Sciences,2022, 40(4):59-68. doi:10.3969/j.issn.1003−1375.2022.04.009.
Citation: LI Huiling,ZHANG Ming,FAN Xiaoyi,et al. Consistency Analysis of Observation Data from Different Types of Pendulum Tiltmeters[J]. North China Earthquake Sciences,2022, 40(4):59-68. doi:10.3969/j.issn.1003−1375.2022.04.009.

不同型号摆式倾斜仪观测资料的一致性分析

Consistency Analysis of Observation Data from Different Types of Pendulum Tiltmeters

  • 摘要: 利用相关系数法分析泰安台SSQ、VS、RZB和CZB四套摆式倾斜仪的潮汐因子和分量趋势变化特征;利用S变换和降雨效率分析抽水、降雨对倾斜观测资料的影响;分析了倾斜观测的气压干扰程度及映震能力。结果表明:摆式倾斜观测资料在变化趋势以及抽水、降雨、气压干扰影响方面有一定的一致性特征,在资料分析、异常识别中可以相互佐证,其中洞室SSQ和VS观测资料的一致性最高,但具体表现形态和变化幅度存在差异;抽水干扰信号频率在0.6×10−3 Hz以下,NS分量受抽水影响均大于EW分量,仪器距离抽水井越近、安装深度与抽水井深度越接近影响越大;雨季初始时段连续降雨的效率大于第二时段,且NS分量大于EW分量;山洞内的SSQ、VS受气压干扰程度较钻孔中的RZB和CZB严重;形变仪器本身的滤波性能,造成仪器映震能力相差较大,记录地震个数最大相差近12倍。

     

    Abstract: The characteristics of tide factor and component trend of four pendulum tiltmeters (SSQ、VS、RZB and CZB) at Tai'an station are analyzed using Correlation Coefficient method. The influence of pumping water and rainfall on tilt observation data is analyzed by using S-transform and rainfall efficiency, and the degree of influence of air pressure variation interference and the ability of reflecting earthquake are also analyzed. The results show that the pendulum tilt observation has certain consistency in the changing trend, as well as in the influence of pumping water, air pressure and rainfall disturbance, so it can support each other in the data analysis and anomaly recognition. The consistency of observation between SSQ and VS instrument is the highest, however, there are differences in their specific manifestations and the extent of change. The frequency of pumping interference signal is below 0.6×10-3 Hz, and the NS component is more affected by pumping than the EW component. The closer the instrument is to the well, the closer the depth of the instrument is to the depth of the well, the greater the influence is. The efficiency of continuous rainfall in the initial period of rainy season is greater than that in the second period, and the efficiency of NS component is higher than that of EW component. The SSQ and VS instruments in the cave are more seriously disturbed by air pressure than the RZB and CZB instruments in the borehole. The filtering performance of the deformation instruments itself results in a great difference in the earthquake-reflecting ability of the instruments, and the difference of recorded earthquake numbers can reach nearly 12 times.

     

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