| 地磁谐波振幅比异常特征的进一步研究及定性解释 |
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| 引用本文： | 冯志生,居海华,李鸿宇,张秀霞,杨从杰,立金柱.地磁谐波振幅比异常特征的进一步研究及定性解释[J].华南地震,2009,29(1):17-23. |
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| 作者姓名： | 冯志生 居海华 李鸿宇 张秀霞 杨从杰 立金柱 |
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| 作者单位： | 江苏省地震局,江苏,南京,210014 |
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| 摘 要： | 分析了新疆喀什台地磁谐波振幅比在几个6级地震前后的变化特征，结合上海佘山和崇明台的研究结果，发现当震中距较大时，地磁谐波振幅比的异常变化过程具有由长周期向短周期迁移的现象，而当震中距较小时，其异常变化过程则具有由短周期向长周期迁移的现象；并对其进行了定性解释。
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| 关 键 词： | 地磁异常 地震 谐波 迁移 |
Further Study on Characteristics of Long-Term and Medium-Term Variations of Geomagnetic Harmonic Wave Amplitude Ratios before Moderate or Strong Earthquakes |
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| FENG Zhisheng,JU Haihua,LI Hongyu,ZHANG Xiuxia,YANG Congjie,LI Jinzhu.Further Study on Characteristics of Long-Term and Medium-Term Variations of Geomagnetic Harmonic Wave Amplitude Ratios before Moderate or Strong Earthquakes[J].South China Journal of Seismology,2009,29(1):17-23. |
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| Authors: | FENG Zhisheng JU Haihua LI Hongyu ZHANG Xiuxia YANG Congjie LI Jinzhu |
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| Institution: | Earthquake Administration of Jiangsu Province;Nanjing 210014;China |
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| Abstract: | In this paper,the characteristics of short -period geomagnetic harmonic wave amplitude ratios at Kashi geomagnetic station in Xinjiang area before several Ms6.0 earthquakes are studied. Incorporating the results of Sheshan and Chongming geomagnetic stations in Shanghai,it is found the anomalous variations migrated from short-period to long-period when the epicentral distance is smaller,and from long-period to short-period when the epicentral distance is larger. This paper also explains this phenomenon quali... |
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| Keywords: | Geomagnetic anomaly Harmonic wave Earthquake Migration |
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