地磁逐日比与新疆及周边地区强震关系

艾萨·伊斯马伊力; 冯志生; 陈界宏; 邢浩; 毛志强; 俎强; 赵家庆

doi:10.11728/cjss2021.04.617

地磁逐日比与新疆及周边地区强震关系

doi: 10.11728/cjss2021.04.617 cstr: 32142.14.cjss2021.04.617

1. 新疆维吾尔自治区地震局乌鲁木齐 830011;
2. 江苏省地震局南京 210014;
3. 中国地质大学地球物理与空间信息学院武汉 430074;
4. 中国地质调查局乌鲁木齐自然资源综合调查中心乌鲁木齐 830057

基金项目:

新疆地震科学基金项目（202001，201703），中国地震局2019年震情跟踪青年课题（2019010409）和中国地震局监测、预报、科研三结合项目（3JH-201901097）共同资助

详细信息

作者简介:

艾萨·伊斯马伊力,E-mail:aisa@cug.edu.cn

中图分类号: P353
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出版历程
- 收稿日期: 2020-07-18
- 修回日期: 2021-06-07
- 刊出日期: 2021-07-15

Geomagnetic Day by Day Ratio and Its Relationship with Strong Earthquakes in Xinjiang and Its Adjacent Areas

1. Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumqi 830011;
2. Earthquake Agency of Jiangsu Province, Nanjing 210014;
3. Institute of Geophysics and Geomatics, China University of Geoscience, Wuhan 430074;
4. Urumqi Natural Resources Comprehensive Survey Center, China Geological Survey, Urumqi 830057

摘要

摘要: 利用2009年1月1日至2019年12月31日新疆及周边区域12个地磁台站的地磁垂直分量日变幅数据，计算其日变幅逐日比，进而分析新疆及周边地区逐日比异常特征，研究其与磁暴和强震的关系.结果表明：强地震多发生在逐日比异常出现后半年，其中等待时间最短为20天，等待时间最长为220天，震中多位于异常集中区域或异常分界线及附近区域；新疆及周边地区逐日比异常报对率为78%，异常虚报率为22%，研究时间段内没有出现漏报现象，说明新疆及周边地区强地震与逐日比高值之间存在一定的相关性；若异常日前后未发生强磁暴或其Dst指数小于异常第二日，则异常可能性较大.本研究增强了地磁垂直分量逐日比异常判据的可靠性，其结果可以为新疆强震活跃期的判定及地震预报提供研究参考依据.
- 逐日比 /
- 地磁异常 /
- 强震 /
- 地磁垂直分量
Abstract: Daily variation of geomagnetic vertical component has important position in the study of earthquake precursor analysis. The variation magnetic field makes an induced magnetic field because of the Earth, conductivity, and the induced magnetic field includes the information not only from the outer magnetic field but also about the electrical conductivity of underground. The Earth's magnetic field geomagnetic vertical component reflects more changes of underground activity than other components. The method of day by day ratio with amplitude of geomagnetic vertical component is based on this theory. Because of this, This paper calculates the daily ratio of daily amplitude of geomagnetic vertical component by using the data at stations in Xinjiang and its surrounding areas, analyzes the characteristics of daily ratio and the earthquake cases in Xinjiang and its surrounding areas, analyzes the characteristics of daily ratio and the earthquake cases in north-south seismic belt. Opposed-phase induced magnetic field on opposite sides of the current was caused by daily ratio anomalies induced by underground current, and this formation mechanism is similar with the geomagnetic low point displacement anomaly. The study strengthened the reliability of using the method of day by day ratio to judge earthquake geomagnetic precursory anomaly information.
- Day by day ratio /
- Geomagnetic abnormity /
- Strong earthquake /
- Geomagnetic vertical component

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参考文献(26)

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