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乌什MS7.1地震前地倾斜、地应变加卸载响应比异常分析

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基于岩石应力的本构关系,以2024年1月23日乌什MS7.1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.
ANALYSIS OF ABNORMAL GROUND TILT AND GROUND STRAIN RESPONSE RATIO(LURR)BEFORE WUSHI MS7.1 EARTHQUAKE
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 MS7.1 earthquake on January 23,2024 were used as the"response variables".The Coulomb stress triggered model'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,indica-ting 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.

Load/Unload Response RatioGround tiltcrustal strainWushi MS7.1 earthquake

范亚玲、赵彬彬

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新疆维吾尔自治区地震局,新疆乌鲁木齐 830011

加载卸载响应比(LURR) 地倾斜 地应变 乌什MS7.1地震

新疆地震科学基金新疆地震科学基金中国地震局监测、预报、科研三结合项目

2023022023013JH-202401104

2024

内陆地震
新疆维吾尔自治区地震局

内陆地震

影响因子:0.495
ISSN:1001-8956
年,卷(期):2024.38(2)