| 红河断裂带北段地震精定位研究 |
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| 引用本文： | 孙庆山,李乐.红河断裂带北段地震精定位研究[J].地震,2018,38(3):92-102. |
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| 作者姓名： | 孙庆山 李乐 |
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| 作者单位： | 中国地震局地震预测重点实验室, 中国地震局地震预测研究所, 北京 100036 |
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| 基金项目： | 地震预测研究所基本科研业务专项(2015IES010203, 2015IES0407), 国家自然科学基金(41474031)共同资助 |
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| 摘 要： | 应用结合波形互相关技术的双差地震定位法对红河断裂带北段1999—2015年发生的地震进行重新定位。 重新定位后残差明显降低, 震中相比于定位前分布更为集中, 绝大部分地震位于5~15 km的中上地壳。 对重定位结果进行误差分析, 统计显示在95%置信水平下, 定位误差椭圆的长轴基本不超过2.6 km, 水平和垂直方向定位误差均为1.6 km, 定位结果具有较好的稳定性。
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| 关 键 词： | 双差地震定位法 波形互相关 定位误差分析 红河断裂带 |
| 收稿时间： | 2018-03-13 |
Accurate Relocation of Earthquakes along the Northern Segment of Honghe Fault Zone |
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| SUN Qing-shan,LI Le.Accurate Relocation of Earthquakes along the Northern Segment of Honghe Fault Zone[J].Earthquake,2018,38(3):92-102. |
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| Authors: | SUN Qing-shan LI Le |
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| Institution: | Key Laboratory of Earthquake Prediction, Institute of Earthquake Forecasting, CEA. Beijing 100036, China |
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| Abstract: | We relocated earthquakes occurred along the northern segment of the Honghe fault zone between 1999 and 2015 by using the double-difference location method based on the combined set of catalog and cross-correlation data. Relocated result reveals that a focused picture of seismicity with most of events occurred in the depth range of 5~15 km. The relocated RMS residuals obviously decrease than before. Location errors estimates show that the lengths of the 95% confidence ellipsoids axes are less than 2.6 km. The estimated relative location uncertainty is approximately 1.6 km both horizontally and vertically, so that the result is rather stable. |
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| Keywords: | Earthquake relocation Double-difference method The Honghe fault zone |
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