库尔勒铁门关钻孔应变震前固体潮畸变现象分析  

ANALYSIS ON SOLID TIDE DISTORTION OF BOREHOLE STRAIN IN KORLA STATION

作　　者：王在华[1] 徐长银[2] 李尚伟[1] 祖丽菲亚.尼亚孜 

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011 [2]新疆维吾尔自治区地震局库尔勒地震台,新疆库尔勒841000 [3]新疆克孜尔水库管理局,新疆拜城842313

出　　处：《内陆地震》2011年第3期229-238,共10页Inland Earthquake

基　　金：新疆地震科学基金课题(200809)

摘　　要：通过对库尔勒铁门关体应变3年的观测资料进行可靠性分析认为本台站资料达到了I类台精度,干扰主要为气压效应和水位干扰,观测资料记录到的固体潮清晰。利用低通滤波和一阶差分的方法,可以识别出固体潮畸变。对识别出的48次固体潮畸变现象进行了统计,统计结果表明,6次畸变为干扰1,3次近震前存在固体潮畸变现象,其余畸变发生在强远震前。经过讨论分析认为观测中记录到的固体潮畸变现象是震前异常信号,但无法区分为近震前的信号还是强远震前的信号。In this paper,the reliability analysis of volume strain observational data for three years in korla station show the observation accuracy achieve I station＇s accuracy.The main disturbance is air pressure effect and water level interference.The observational data can record the clear solid tide.We distinguished 48 distortion of solid tide by low pass filtering and first difference.The statistical result shows 6 distortion was interference,13 distortion appeared before near earthquakes,and the others appeared before strong distant earthquakes.The distortion of solid tide in observational data was abnormal signal before earthquake,but it can not be distinguished that the abnormal signal was before near earthquakes or before strong distant earthquakes.

关 键 词：体应变 固体潮畸变 干扰因素 变异系数 强远震 近震 

分 类 号：P315.72[天文地球—地震学]