| 2010年河南太康MS4.6地震序列震源参数的精确确定 |
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| 引用本文： | 韩立波,蒋长胜,包丰.2010年河南太康MS4.6地震序列震源参数的精确确定[J].地球物理学报,2012,55(9):2973-2981. |
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| 作者姓名： | 韩立波 蒋长胜 包丰 |
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| 作者单位： | 1. 中国地震局地球物理研究所, 北京 100081;2. 中国科学技术大学地球和空间科学学院, 合肥 230026;3. 中国科学院测量与地球物理研究所大地测量与地球动力学国家重点实验室, 武汉 430077 |
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| 基金项目： | 中国地震局地球物理研究所中央级基本科研业务专项，国家科技支撑课题 |
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| 摘 要： | 精确确定地震的震源机制解、震源深度和序列的相对位置是地震危险性分析的重要基础.2010年10月24日和2011年3月8日,河南太康地区分别发生MS4.6和MS4.1显著地震,为分析该弱震、少震区的地震危险性,本文利用CAP方法反演了震源机制解和震源深度,并结合深度震相波形记录进一步确认了深度的可靠性.结果显示,两次地震的震源机制解较为接近,均以走滑为主,深度也均为13km左右.此外,以主震作为参考事件,采用主事件法对余震的水平位置进行了相对定位,定位结果显示余震空间上分布的走向分别与主震震源机制解两个节面走向大致相同.本文结果为研究当地地震危险性提供了一定依据.
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| 关 键 词： | 震源深度 震源机制解 相对定位 |
| 收稿时间： | 2012-05-10 |
Source parameter determination of 2010 Taikang Ms4.6 earthquake sequences |
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| HAN Li-Bo
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JIANG Chang-Sheng
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BAO Feng.Source parameter determination of 2010 Taikang Ms4.6 earthquake sequences[J].Chinese Journal of Geophysics,2012,55(9):2973-2981. |
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| Authors: | HAN Li-Bo JIANG Chang-Sheng BAO Feng |
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| Institution: | 1. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;2. School of Earth and Space Science, University of Science and Technology of China, Hefei 230026, China;3. Geodetic Survey and Geodynamics National Key Lab, Institute of Geodesy and Geophysics, China Earthquake Administration, Wuhan 430077, China |
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| Abstract: | Determinations of focal mechanism, focal depth and earthquake sequences relative locations play an important role on seismic hazard evaluation. On Oct 24, 2010 and Mar 8, 2011, a MS4.6 event and a MS4.1 event occurred in Taikang region. To evaluate the seismic hazard of this region, focal mechanisms and focal depths of these two events are inverted by CAP method. Depth phase sSmS are also used to confirm focal depths. The inversion results show that these two events have similar focal mechanisms, and focal depths are about 13 km. In addition, relative epicenter relocation is performed to relocate the aftershocks using the main shock as the reference event. The spatial orientations of relocated aftershocks show conjugate distribution, corresponding to the two fault planes of the main shock. The results provide fundamental information for seismic hazard study in this region. |
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| Keywords: | Focal depth Focal mechanism Relative earthquake location |
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