| 四川九寨沟7.0级、新疆精河6.6级地震山西定点形变异常分析 |
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| 引用本文： | 冯建琴,杨静,张聪聪,李军,李艳,沈晓松.四川九寨沟7.0级、新疆精河6.6级地震山西定点形变异常分析[J].山西地震,2019(3):29-32. |
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| 作者姓名： | 冯建琴 杨静 张聪聪 李军 李艳 沈晓松 |
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| 作者单位： | 山西省地震局临汾中心地震台;太原大陆裂谷动力学国家野外科学观测研究站;山西省地震局;山西省地震局太原基准地震台 |
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| 摘 要： | 文章运用山西定点形变观测数据,分析2017年8月8日四川九寨沟7.0级地震、8月9日新疆精河6.6级地震的前兆异常,讨论了异常的信度。结果表明,九寨沟和新疆精河地震前,山西地区部分倾斜、应变仪器的观测数据出现了较为可靠的短临前兆异常变化,异常出现在震前3~180 d,主要表现为短时间内的破年变、转折、加速等。各定点形变台站在异常出现的时间上呈明显的准同步性特征。
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| 关 键 词： | 定点形变 前兆异常 准同步性 |
Analysis of Fixed-point Deformation Anomalies in Shanxi of Jiuzhaigou M7.0 Earthquake in Sichuan and Jinghe M6.6 Earthquake in Xinjiang |
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| FENG Jian-qin,YANG Jing,ZHANG Cong-cong,LI Jun,LI Yan,SHEN Xiao-song.Analysis of Fixed-point Deformation Anomalies in Shanxi of Jiuzhaigou M7.0 Earthquake in Sichuan and Jinghe M6.6 Earthquake in Xinjiang[J].Earthquake Research in Shanxi,2019(3):29-32. |
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| Authors: | FENG Jian-qin YANG Jing ZHANG Cong-cong LI Jun LI Yan SHEN Xiao-song |
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| Institution: | (Linfen Central Seismic Station, Earthquake Administration of Shanxi Province,Linfen, Shanxi 041000, China;Earthquake Administration of Shanxi Province, Taiyuan, Shanxi 030021, China;Taiyuan Reference Seismic Station, Earthquake Administration of Shanxi Province, Taiyuan, Shanxi 030025, China;National Continental Rift Valley Dynamics Observatory of Taiyuan, Taiyuan, Shanxi 030025, China) |
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| Abstract: | Based on the observed data of fixed-point deformation in Shanxi Province, the precursory anomalies of the Jiuzhaigou M7.0 earthquake on August 8, 2017 and the Jinghe M6.6 earthquake on August 9, 2017 are analyzed, and the reliability of the anomalies is discussed in this paper. The results show that before the Jiuzhaigou and Jinghe earthquakes, some of the observation data of tilt and strain instruments in Shanxi area showed relatively reliable short-term and imminent precursory anomalies, which occurred 3~180 days before the earthquake. The anomalies mainly manifested as breaking, turning and accelerating anomalies in a short period of time. The process of the anomalies appeared at all fixed-point deformation stations showed obvious quasi-synchronous characteristics. |
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| Keywords: | Fixed-point deformation Precursory anomaly Quasi-synchronization |
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