Shear-wave Splitting of Aftershocks of the M_S 5.7 Jiujiang-Ruichang Earthquake

查看全文 作　　者：Tang [1]Lanrong;Shi [2]Yutao;Zeng [1]Xinfu;Zheng [1]Bin;Zhao [2]Bo;Lv [1]Jian

机构地区：[1]Earthquake Administration of Jiangxi Province;[2]Institute of Earthquake Science, China Earthquake Administration

出　　处：《Earthquake Research in China》索引2013年第27卷第1期,共10页

基　　金：sponsored by the China Spark Program of Earthquake Science and Technology(XH12027);the Three-Combination Topics of China Earthquake Administration of'Research on the Crustal Medium Anisotropy in the Jiujiang-Ruichang Earthquake Area';the Special Fund of Seismic Industry Research(201008007) 摘　　要：Shear wave splitting is studied based on the digital waveforms of three seismic stations DJS, SZD and WUJ, which were set up after the Jiujiang-Ruichang MS5.7 earthquake of November 26, 2005 around the epicenter area. The result shows that the time delays of slow shear waves of the DJS station, which is not far from the epicenter and where the distribution of faults is complex near the station, are relatively larger and the polarization directions of fast shear waves are not concentrated; the predominant polarization direction of fast shear waves of WUJ station, with single fault distributed nearby, has a difference of 35° to the strike of the fault and is inconsistent with the direction of regional principal compressive stress. The predominant polarization direction of fast shear waves of SZD station with no faults nearby is in accordance with regional principal compressive stress. There is no obvious regular relationshipship between the delay time and the focal depth. 关键词：横波分裂地震余震九江故障分布偏振方向主压应力快横波地震台站

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Shear-wave Splitting of Aftershocks of the M_S 5.7 Jiujiang-Ruichang Earthquake

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