检索结果-南通市图书馆

Source mechanism of strong aftershocks (M_s≥5.6) of the 2008/05/12 Wenchuan earthquake and the implication for seismotectonics

引用

Science China Earth sciences 2009年第6期52卷 739-753页

作者： zheng yong1,2,ma hongsheng3.lü jian4,ni sidao5,{3.,chinese academy of sciences,wuhan 43.077,China 2 institute of geophysics,chinese Earthquake Administration,Beijing 100086,China 3.institute of Earthquake Science,chinese Earthquake Administration,Beijing 100086,China 4 Earthquake Administration of jiangxi Province,Nanchang 3.003.,China 5 School of Earth and Space Science,University of Science and Technology of China,Hefei 23.026,China 6 Earthquake Administration of jiangsu Province,Nanjing 210014,China 1. institute of geodesy and geophysics Chinese Academy of Sciences Wuhan 430077 China 2. institute of geophysics Chinese Earthquake Administration Beijing 100086 China 3. institute of Earthquake Science Chinese Earthquake Administration Beijing 100086 China 4. Earthquake Administration of jiangxi Province Nanchang 330039 China 5. School of Earth and Space Science University of Science and Technology of China Hefei 230026 China 6. Earthquake Administration of jiangsu Province Nanjing 210014 China

Dozens of >M5, hundreds of >M4, and much more >M3.aftershocks occurred after the 2008/05/12 Wenchuan earthquake, which were well recorded by permanent and portable seismic stations. After relocated with P arrival, the >M3.aftershocks show two trends of distribution, with most of the aftershocks located along the north-east strike consistent with longmenshan fault system, yet there is a north-west trend around the epicenter. It seems that substantially more aftershocks occur in regions with crystalline bedrocks. Then we collected waveform data from National Digital Seismograph Network and regional seismograph network of China, and employed 'Cut and Paste' method to obtain focal mechanisms and depths of the big aftershocks (M≥5.6). While most of those aftershocks show thrust mechanism, there are some strike slip earthquakes in the northern-most end of the rupture. Focal mechanisms show that the events located on the southern part of central Beichuan-Yingxiu Fault (BY) are mainly thrust earthquakes, which is consistent with initial mechanism of the main shock rupture. In the north part the aftershocks along the BY are also dominated by thrust slip, which is quite different from the right slip rupture of the main shock. Around Qingchuan-Pingwu Fault, the focal mechanisms are dominated by right-slip rupture with large depths (~18 km). So we suspected that in the north part the main shock might rupture on two faults: Beichuan Fault and Qingchuan-Pingwu Fault. The complex pattern of aftershock mechanisms argues for presence of a complicated fault system in the longmenshan area.

关键词： focal mechanism seismotectonics Wenchuan earthquake cut and paste.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：