fmax and fault zone property of Lushan earthquake of 20 April 2013,Sichuan,China

作     者：Jian Wen Xiaofei Chen 

作者机构：School of Earth & Space ScienceUniversity of Science and Technology of China 

出 版 物：《Earthquake Science》 (地震学报（英文版）)

年 卷 期：2013年第26卷第3期

页      面：179-183页

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 07[理学] 070904[理学-构造地质学] 0707[理学-海洋科学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0815[工学-水利工程] 0816[工学-测绘科学与技术] 0813[工学-建筑学] 0814[工学-土木工程] 0825[工学-航空宇航科学与技术] 0704[理学-天文学] 

基　　金：supported by the National Nature Science Foundation of China(Grant numbers:41090293 41274053) 

主　　题：Lushan earthquake fmax Strongground motion Fault-zone width Cohesive zone 

摘      要：In this study, we determined fnax from near- field accelerograms of the Lushan earthquake of April 20, 2013 through spectra analysis. The result shows that the values of fmax derived from five different seismography stations are very close though these stations roughly span about 100 km along the strike. This implies that the cause offmax is mainly the seismic source process rather than the site effect. Moreover, according to the source-cause model of Papageorgiou and Aki （Bull Seism Soc Am 73：693-722, 1983）, we infer that the cohesive zone width of the rupture of the Lushan earthquake is about 204 with an uncertainty of 13 m. We also find that there is a significant bulge between 30 and 45 Hz in the amplitude spectra of accel- erograms of stations 51YAL and 51QLY, and we confirm that it is due to seismic waves＇ reverberation of the sedi- mentary soil layer beneath these stations.