• 首页关于本刊投稿须知期刊订阅编委会期刊合作查询检索English
引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 128次   下载 198 本文二维码信息
码上扫一扫!
分享到: 微信 更多
基于三维模型中的射线追踪方法测定鲁甸MS6.5地震震源深度
李飞1, 俞贵平2, 梁姗姗1, 张雪梅1, 黄志斌1
1.中国地震台网中心, 北京 100045;2.中国科学院地质与地球物理研究所, 北京 100029
摘要:
2014年8月3日云南鲁甸发生MS6.5地震,造成重大人员伤亡和财产损失。此次地震发震构造复杂,引起了地震学界的广泛关注。本文基于三维建模方法,建立鲁甸地区三维层状非均匀速度模型,采用逐段迭代射线追踪方法对鲁甸MS6.5地震进行三维射线追踪走时计算;利用震中距150km范围内的近震Pg波震相走时数据,通过射线追踪走时拟合获得鲁甸地震的震源深度约为12km,与前人研究成果基本一致,表明了本文采用的三维建模和射线追踪方法的有效性。
关键词:  鲁甸地震  三维  速度模型  射线追踪  震源深度
DOI:
分类号:P315
基金项目:国家自然科学基金(41604054)资助
Focal Depth Determination of Ludian MS6.5 Earthquake with a Segmentally Iterative Ray Tracing Method in 3D Geological Models
Li Fei1, Yu Guiping2, Liang Shanshan1, Zhang Xuemei1, Huang Zhibin1
1.China Earthquake Networks Center, Beijing 100045, China;2.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
Abstract:
An MS6.5 earthquake occurred in Ludian,Yunnan Province on August 3,2014,and caused heavy casualties and property losses. The seismogenic structure of Ludian MS6.5 earthquake was quite complex,and had attracted wide attention of seismologists. In this paper,a 3D layered heterogeneous velocity model in Ludian area is established based on a 3D modeling method,and a segmentally iterative ray tracing method is used in the traveltime calculation of Ludian MS6.5 earthquake. We utilize the first arrivals recorded by the regional stations within 150km of epicenter distance,and calculate the focal depth of Ludian MS6.5 earthquake through the method of traveltime fitting. The focal depth of Ludian MS6.5 earthquake obtained in this study is about 12km,which is close to the results of previous studies. Numerical tests indicate the effectiveness of our methods of blocked modeling and ray tracing.
Key words:  Ludian earthquake  3D  Velocity model  Ray tracing  Focal depth