摘要
利用Hypo2000+HypoDD联合定位方法,基于35个科考台站和四川测震台网记录资料,对2013年6月25日至2014年12月31日发生的芦山M_S 7.0地震余震序列进行重定位。重新定位后,EW、NS和UD向平均误差分别为0.141 km、0.143 km、0.147 km,平均到时残差0.066 s,震源深度优势分布范围8—18 km。定位结果显示,芦山地震余震呈带状分布,主要分布在大邑—名山断裂和双石—大川断裂之间,沿SW方向,长度约40 km。
Based on the records from 35 research stations and Sichuan network, the aftershocks of Lushan M_S 7.0 earthquake between June 25, 2013 and December 31, 2014 are relocated, using the Hypo2000＋HypoDD combined method. After relocated, the average error of EW, NS and UD are 0.141 km, 0.143 km, and 0.147 km, respectively. The average travel time residual is 0.066 s. Most aftershocks occurred at depth of 8—18 km. The results suggest that the aftershocks concentrate between Dayi-Mingshan and Shuangshi-Dachuan fault, forming a southwest-trending belt with about 40 km long.
出处
《地震地磁观测与研究》
2017年第4期1-6,共6页
Seismological and Geomagnetic Observation and Research
基金
中国地震局监测
预测
科研三结合课题(项目编号:162301
162302)
关键词
Hypo2000
HypoDD
联合定位
芦山余震序列
Hypo2000,double-different location,combined location,aftershock sequence of Lushan earthquake
