| 2017年8月9日精河MS6.6地震前钻孔应变异常特征分析 |
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| 引用本文： | 赵彬彬,高丽娟. 2017年8月9日精河MS6.6地震前钻孔应变异常特征分析[J]. 中国地震, 2017, 33(4): 728-740 |
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| 作者姓名： | 赵彬彬 高丽娟 |
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| 作者单位： | 新疆维吾尔自治区地震局, 乌鲁木齐市新市区科学二街338号 830011,新疆维吾尔自治区地震局, 乌鲁木齐市新市区科学二街338号 830011 |
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| 基金项目： | 中国地震局2017年度震情跟踪合同制项目（2017010123）资助 |
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| 摘 要： | 利用形态分析法对天山中段钻孔应变资料进行分析，认为2017年8月9日新疆精河MS6.6地震前天山中段钻孔应变出现明显的短期异常及临震异常。研究结果表明，精河地震发生前，天山中段9套钻孔应变资料中有5套出现异常现象，其中，2项短期异常，3项临震异常；异常特征主要表现为压缩-拉张变化、压缩速率变快、高频抖动信息、规律性脉冲及周期性台阶变化等；钻孔应变异常中，如果多套钻孔应变资料在同一时间段均出现异常，要重点关注极大应变方向重合区域；此次震前异常出现的时间顺序在空间上与天山中段断裂走向基本一致。
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| 关 键 词： | 精河MS6.6地震 钻孔应变 前兆异常 时空演化 |
| 收稿时间： | 2017-09-20 |
| 修稿时间： | 2017-12-12 |
Borehole strain anomaly characteristics analysis before the Jinghe MS6.6 earthquake on August 9,2017 |
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| Zhao Binbin and Gao Lijuan. Borehole strain anomaly characteristics analysis before the Jinghe MS6.6 earthquake on August 9,2017[J]. Earthquake Research in China, 2017, 33(4): 728-740 |
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| Authors: | Zhao Binbin and Gao Lijuan |
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| Affiliation: | Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumqi 830011, China and Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumqi 830011, China |
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| Abstract: | We use the morphological analysis method to analysis borehole strains'' data in mid-range of the Tianshan Mountains. The results indicate that there are 5 borehole strains with anomalies in the total 9 borehole strains before this earthquake, which include 2 short-term anomalies and 3 impending anomalies. The anomaly characteristics are of tensin-compress feature, faster compression rate, high frequency information and regular pulse and periodic steps. If two or several borehole strains had anomalies at the same time, we should then pay more attention to the overlap area of maximum strain direction. |
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| Keywords: | The Jinghe MS6.6 earthquake Borehole strain Precursory anomalies Spatio-temporal evolution |
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