四川芦山M_s 7.0级地震震源机制解初步研究

英文篇名：Focal Mechanism Solution of M_s 7.0 Lushan Earthquake,April 20,2013
中文刊名：科技导报
英文刊名：Science & Technology Review
作者：曾祥方 ; 韩立波 ; 石耀霖
英文作者：ZENG Xiangfang 1 ; HAN Libo 2 ; SHI Yaolin 1 1.Key Laboratory of Computational Geodynamics of Chinese Academy of Sciences ; College of Earth Science ; University of Chinese Academy of Sciences ; Beijing 100049 ; China 2.Institute of Geophysics ; China Earthquake Administration ; Beijing 100081 ; China
中文关键词：芦山Ms 7.0级地震 ; 地震震源机制解 ; 矩心深度
英文关键词：Lushan M s 7.0 earthquake ; focal mechanism solution ; centroid depth
出版日期：2013-04-28
机构：中国科学院计算地球动力学重点实验室;中国科学院大学地球科学学院;中国地震局地球物理研究所;
年：2013
期：12
出版单位：科技导报

摘要

震源机制解研究是认识地震发震断层的重要手段,也是理解深部构造应力和地震发震机制的重要依据。2013年4月20日四川芦山发生Ms 7.0级地震,利用近震直达P波初动极性反演了地震机制解,同时利用全球地震台网波形记录,反演了地震机制解和矩心深度。两种方法所得发震断层走向倾角滑动角分别为208°/41°/98°和220°/46°/93°,表明这次地震为一高角度逆冲型地震,远震波形反演得到的矩心深度为12km。
Focal mechanism provides key information on seismogenic fault and helps to understand tectonic stress field and.First motion of direct P wave recorded at regional seismic station and teleseismic body wave were employed to invert focal mechanism of Lushan M s 7.0 earthquake,April 20,2013.The strike,dip and rake of fault planes of our results are 208° /41° /98° and 220° /46° /93° respectively.Both fault plane and centroid depth are close to results provided by other institutes with different methods and dataset.

引文

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