红河断裂带北段地震精定位研究

地震 ›› 2018, Vol. 38 ›› Issue (3): 92-102.

红河断裂带北段地震精定位研究

孙庆山, 李乐

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

收稿日期:2018-03-13 发布日期:2019-08-15
通讯作者: 李乐,副研究员。E-mai:lile@cea-ies.ac.cn
作者简介:孙庆山(1992-),男,山东省肥城人,在读硕士研究生,主要从事重复地震研究
基金资助:
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

Accurate Relocation of Earthquakes along the Northern Segment of Honghe Fault Zone

SUN Qing-shan, LI Le

Key Laboratory of Earthquake Prediction, Institute of Earthquake Forecasting, CEA. Beijing 100036, China

Received:2018-03-13 Published:2019-08-15

摘要/Abstract

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。

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

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.

Key words: Earthquake relocation, Double-difference method, The Honghe fault zone

中图分类号:

P315.7

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.

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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