洞体应变、水管倾斜仪低频段记录数据差异的对比研究  

Performance of Extension-Meter and Water-Tube Tiltmeter in Low-Frequency Based on Amplitude-Spectrum of Recording Data at the Same Site

作　　者：崔庆谷[1] 曹白伦 李燕玲[1] CUI Qinggu;CAO Bailun;LI Yanling(Yunnan Earthquake Agency,148 Beichen Road,Kunming 650224,China)

机构地区：[1]云南省地震局,昆明市650224

出　　处：《大地测量与地球动力学》2023年第5期534-537,共4页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41874111)。

摘　　要：以固体潮汐包络为标准对云龙台同点记录数据进行统一量化,利用量化数据计算振幅谱,并根据振幅随频率的变化评判不同记录数据对长周期慢变信号的响应,分析洞体应变、水管倾斜仪低频段记录数据的差异。结果表明,对于周期大于固体潮汐的低频慢变信号,洞体应变、水管倾斜仪的响应存在较大差异,这种差异可能导致记录数据中出现孤立或零星的异常变化,且在同点其他数据中找不到踪迹。本文结论在云龙台、永胜台多种同点仪器的观测数据中得到证实。At same time and point on the earth,crustal deformation and vibration are identical,but the recording of different observation instruments differs.One important metric affecting earthquake forecast is that the precursory signal in one kind of record cannot be found in another at the same site.We calculate the amplitude-spectrum of the data from extension-meter and water-tube tiltmeter and analyze the relation between amplitude-spectrum and capability for anomaly signal detecting.The results show that when an anomaly signal is weak,it may appear only in one recording but not in others at the same site.So,if an anomaly signal in one recording cannot be found in others at the same site,it cannot be evidence for falsification.This argument is supported by field data in Yunlong and Yongsheng stations.

关 键 词：不同仪器 同点观测 振幅谱 低频信号 

分 类 号：P315[天文地球—地震学]