| 安徽两次中等地震发震断层参数测定 |
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| 引用本文： | 刘泽民,张军,沈小七,李敏莉,郑先进.安徽两次中等地震发震断层参数测定[J].华南地震,2008,28(3):89-94. |
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| 作者姓名： | 刘泽民 张军 沈小七 李敏莉 郑先进 |
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| 作者单位： | 1. 中国科学与技术大学,地球与空间科学学院,安徽,合肥,230026;安徽省地震局,安徽,合肥,230031
2. 安徽省地震局,安徽,合肥,230031 |
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| 摘 要： | 根据地震波传播过程中的多普勒效应。利用拐角频率的方向变化，用最小二乘法反演了2005年寿县ML4．1级、2006定远ML4.7级地震的发震断层参数。结果表明，反演得到的中等地震的发震断层参数与震中附近实际断层的参数基本一致，破裂速度均小于S波的速度，且破裂长度为0．2-0．3km。
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| 关 键 词： | 多普勒效应 拐角频率 断层面参数 中等地震 安徽 |
Determination of Fault Plane Parameters of Two Medium Earthquakes in Anhui |
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| LIU Zemin,ZHANG Jun,SHEN Xiaoqi,LI Minli,ZHENG Xianjin.Determination of Fault Plane Parameters of Two Medium Earthquakes in Anhui[J].South China Journal of Seismology,2008,28(3):89-94. |
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| Authors: | LIU Zemin ZHANG Jun SHEN Xiaoqi LI Minli ZHENG Xianjin |
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| Institution: | LIU Zemin , ZHANG Jun, SHEN Xiaoqi, LI Minli and ZHENG Xianjin (1. School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; 2. Earthquake Administration of Anhui Province, Hefei 230031, China) |
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| Abstract: | In this paper, the azimuths of rupture propagation directions and source of two medium earthquakes in Anhui are obtained utilizing the direction change parameters of comer frequency and the least square method according to the earthquake Doppler effect. The results show that the azimuths of rupture propagation directions and source parameters keep the same with the fault directions in the epicenters of medium earthquakes in Anhui. The rupture velocities are all smaller than the S-wave velocity and the rupture lengths are about 0.2-0.3 kilometers. |
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| Keywords: | Doppler effect Comer frequency Fault plane parameter |
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