乌什M_(S)7.1地震前地倾斜、地应变加卸载响应比异常分析  

ANALYSIS OF ABNORMAL GROUND TILT AND GROUND STRAIN RESPONSE RATIO(LURR)BEFORE WUSHI M_(S)7.1 EARTHQUAKE

作　　者：范亚玲 赵彬彬[1] FAN Ya-ling;ZHAO Bin-bin(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《内陆地震》2024年第2期151-157,共7页Inland Earthquake

基　　金：新疆地震科学基金(202302);新疆地震科学基金(202301);中国地震局监测、预报、科研三结合项目(3JH-202401104).

摘　　要：基于岩石应力的本构关系,以2024年1月23日乌什M_(S)7.1地震前震中及周边500 km范围内地倾斜、地应变数据作为“响应量”,利用库伦应力触发模型的加卸载响应比方法进行计算,结果显示,乌什洞体应变等3个测项均出现震前LURR异常,这表明震源区介质存在明显的应力积累过程,同时也说明从倾斜、应变的潮汐频段中能够提取出地震预测的有效信息。This article is based on the constitutive relationship of rock stress.The tilt and ground strain data in the pre earthquake and surrounding 500 km range of the Wushi M_(S)7.1 earthquake on January 23,2024 were used as the“response variables”.The Coulomb stress triggered mode l’s loading unloading response ratio method was used to calculate.The results showed that the Ush cave body strain and other three measurement items all showed pre earthquake LURR anomalies,indicating a significant stress accumulation process in the source area medium.At the same time,it also indicates that the tilt and Effective information for earthquake prediction can be extracted from the tidal frequency band of strain.

关 键 词：加载卸载响应比(LURR) 地倾斜 地应变 乌什M_(S)7.1地震 

分 类 号：P315.7[天文地球—地震学]