防灾减灾工程学报2013，Vol.33Issue(3)：354-360,7.
利用sPn震相精确测定江苏高邮、宝应交界M4.9地震震源深度
Precise Determination of the Focal Depth of Jiangsu Gaoyou-Baoying M4.9 Earthquake by sPn Phase
摘要
Abstract
In this paper,the authors select 16 broadband stations recorded data from digital seismic network in Jiangsu Province,in which the epicentral distance ranges about 280～380 km.Then using the sliding window cross-correlation overlay technique to extract sPn phase,the focal depth of Gaoyou-Baoying M4.9 earthquake on July 20,2012 by sPn-Pn,is exactly determined to be 9.4 km,the total error range less than 1.2 km.In addition,in order to validate the calculation results,we used time-domain moment tensor inverse method,which has not arrival time of phases.By inversion of the different focal depth (5～25 km) models of the moment tensor solution,we find that when focal depth is 9,10 km,the inversion results of the correlation coefficient reaches the maximum,i.e.about 0.93,0.92.This indicates that 9～10 km is the best of focal depth range.Positioning result by the method of double-difference location with waveform cross-correlation is about 10.2 km.The difference is only 0.8 km.关键词
滑动窗互相关叠加技术/sPn震相/震源深度/时域矩张量反演/双差定位法Key words
the sliding window cross-correlation overlay technique/ sPn phase/ focal depth/ timedomain moment tensor inverse/ the method of double-difference location分类
建筑与水利引用本文复制引用
王俊,缪发军,詹小艳,瞿旻,高景春..利用sPn震相精确测定江苏高邮、宝应交界M4.9地震震源深度[J].防灾减灾工程学报,2013,33(3):354-360,7.基金项目
地震行业科研专项(201108014)、中国地震局测震台网专项(20120107)、中国地震局"三结合"课题(20120901)资助 （201108014）
