• 首页关于本刊投稿须知期刊订阅编委会期刊合作查看检索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 2032次   下载 3260 本文二维码信息
码上扫一扫!
分享到: 微信 更多
深度震相sSmS特征及其在震源深度确定中的应用
韩立波1, 罗艳2
1.中国地震局地球物理研究所,北京市海淀区民族大学南路5号100081;2.中国地震局地震预测研究所,北京100036
摘要:
通过一系列理论地震图模拟,研究了莫霍面超临界反射深度震相sSmS的特征,分析了影响该震相的各种因素。结果表明,SmS和sSmS属于高频波,一般情况下在高频段(1Hz左右)可被清晰地观测到;而在更长周期的地震图上,SmS和sSmS的强度比S波或者S多次波弱,不易辨认;地壳结构复杂地区且震源深度较浅时,sSmS震相也不容易被观测到。本文以2011年6月20日腾冲MS5.2地震为研究实例,利用sSmS深度震相确定其震源深度为6km,与其它方法所得结果一致。在利用深度震相测定震源深度的研究中,sSmS震相可以作为震源深度精确测定的手段之一。
关键词:  震源深度 深度震相 SmS sSmS
DOI:
分类号:
基金项目:中国科学院动力大地测量学重点实验室基金(L10-04)资助
Characteristics of depth phase sSmS and its application in focal depth determination
Han Libo1, Luo Yan2
1.Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;2.Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China
Abstract:
We studied the depth phase sSmS and its reference phase SmS dominated by post-critical reflection from Moho using a series of synthetics and analyzed the factors that may affect the phase. The results showed SmS and sSmS were easy to observe in high frequency band (1Hz) , while difficult to identify on long-period seismograms. The complex crustal structure may also make it difficult to identify sSmS phases of events with shallow focal depth. Taken the Tengchong Ms5.2 event on June 20, 2011 as an example, we obtained its focal depth was 6km using depth phase sSmS, which was consistent with the result from the regional waveform modeling, sSmS can be used to determine focal depth with high precision.[著者文摘]
Key words:  Focal depth  Depth phase  SmS  sSmS