| 通海地磁Z分量月变速率与云南中强震预测指标 |
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| 引用本文： | 李树华,陈燕,赵小燕. 通海地磁Z分量月变速率与云南中强震预测指标[J]. 地震地磁观测与研究, 2011, 32(1): 81-84. DOI: 10.3969/j.issn.1003-3246.2011.01.015 |
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| 作者姓名： | 李树华 陈燕 赵小燕 |
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| 作者单位： | 中国昆明,650224,云南省地震局 |
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| 基金项目： | 云南省政府十项措施监测预报项目 |
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| 摘 要： | 利用云南通海1987-2009年的地磁Z分量观测资料,进行差分计算,得到相应的月变速率值.以△Z≥10 nT为判定指标,定量分析云南地区M≥5地震前,通海地磁Z分量月变速率的异常变化.结果表明,通海Z分量月变速率大于10 nT与云南地区5级以上地震对应较好,异常出现后1-6个月云南省地区发生5级以上地震的可能性较大,对...
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| 关 键 词： | 通海地磁Z 月变速率 中强地震 云南省地区 |
Monthly variation rate of geomagnetic Z-component at Tonghai Station and prognostic index before medium-strong earthquakes happened in Yunnan area |
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| Li Shuhua,Chen Yan,Zhao Xiaoyan. Monthly variation rate of geomagnetic Z-component at Tonghai Station and prognostic index before medium-strong earthquakes happened in Yunnan area[J]. Seismological and Geomagnetic Observation and Research, 2011, 32(1): 81-84. DOI: 10.3969/j.issn.1003-3246.2011.01.015 |
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| Authors: | Li Shuhua Chen Yan Zhao Xiaoyan |
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| Affiliation: | (Earthquake Administration of Yunnan Prowince , Kunming 650224, China) |
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| Abstract: | The monthly variation rate value of geomagnetic Z-component has been obtained through difference calculation using geomagnetic Z-component data at Tonghai station from 1987 to 2009. Using △Z≥10 nT as a judging index, we quantitative analysis anomaly changes of geomagnetic Z-component＇s monthly variation rate at Tonghai Station before the earthquakes with M≥5 in Yunnan. The result showed that the link between △Z≥10 nT and earthquakes with M≥5 in Yunnan is obvious. The possibility of earthquakes M≥5 happened 1 6 months later after the anomalies occurred is big, and the corresponding rate can reach 80%. |
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| Keywords: | geomagnetic Z-component of at Tonghai station monthly variation rate mediumstrong earthquakes Yunnan area |
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