| 2016—2017年北天山地区两次6级地震前地电场异常 |
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| 引用本文： | 艾萨·伊斯马伊力,陈界宏,毛志强.2016—2017年北天山地区两次6级地震前地电场异常[J].电波科学学报,2020,35(3):430-436. |
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| 作者姓名： | 艾萨·伊斯马伊力 陈界宏 毛志强 |
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| 作者单位： | 1.新疆维吾尔自治区地震局, 乌鲁木齐 830011 |
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| 基金项目： | 中国地震局震情跟踪青年项目2020010422新疆地震科学基金202001 |
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| 摘 要： | 地下介质在应力积累过程中,会导致岩体裂隙结构变化,从而使得大地电场E T的优势方位角发生变化.文中收集了2016年到2017年的数据,利用大地电场优势方位角方法,提取与分析了北天山地区2016年12月8日呼图壁6.2级和2017年8月9日精河6.6级地震前地电场异常,探讨这两次6级地震前的地电场异常表现特征.结果表明:这两次地震前,震中周围的乌鲁木齐、克拉玛依台均显示出显著的地电场异常,即岩体裂隙优势方位角异常;异常特征以突跳和偏转为主;岩体裂隙结构发生异常时间上存在准同步性,表现出短临异常信息.因此,地电场岩体裂隙优势方位角方法短期内具有一定的预报效能,可为今后利用地电场方法预测地震积累经验和震例.
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| 关 键 词： | 地电场 裂隙结构 北天山地区 呼图壁6.2地震 精河6.6地震 |
| 收稿时间： | 2019-11-15 |
Geoelectric anomalies before the two M6 earthquakes in northern Tianshan in 2016-2017 |
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| YISIMAYILI Aisa,CHEN Jiehong,MAO Zhiqiang.Geoelectric anomalies before the two M6 earthquakes in northern Tianshan in 2016-2017[J].Chinese Journal of Radio Science,2020,35(3):430-436. |
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| Authors: | YISIMAYILI Aisa CHEN Jiehong MAO Zhiqiang |
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| Affiliation: | 1.Earthquake Agency of Xinjiang Uygur Autonomous Region, Urumqi 830011, China2.China University of Geoscience, Wuhan 430074, China |
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| Abstract: | In the process of stress accumulation of underground medium, the fracture structure of rock mass will change, thus the dominant azimuth of geoelectric field ET will change. This paper collects the data of geoelectric minute values of Xinjiang from 2016 to 2017, and analyzes the geoelectric field anomalies utilizing the dominant azimuth method of geoelectric field before the Hutubi M6.2 earthquake on December 8, 2016 and the Jinghe M6.6 earthquake on August 9, 2017 in the northern Tianshan region. Significant geoelectric field anomalies, i.e., deflection of dominant orientation of cracks and large jump, are shown on Urumqi and Karamay stations around the epicenters before these two earthquakes. These phenomena also have features of time quasi-synchronization and site selectivity, showing short-term and imminent abnormal information. The results demonstrate that the geoelectric analysis method is effective in short-term earthquake prediction and accumulate experience and examples for earthquake prediction by geoelectric field method in the future. |
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| Keywords: | geoelectrical field crack structure the northern Tianshan region Hutubi 6 2 earthquake Jinghe 6 6 earthquake |
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