摘要
对地震台记录到的长时间的地球背景噪声进行互相关处理,得到的互相关函数可以近似地表征这两个台站之间的格林函数,这种数据处理方法被称为背景噪声干涉。近年来,背景噪声干涉研究在理论和实践上都有了长足进展,并被广泛用于地下波速结构及其演化规律的研究。本文首先简单介绍了背景噪声干涉研究的概念和理论依据,进而重点介绍了针对噪声源性质、互相关函数的波形到时和振幅特性的应用研究。通过对这三个方面研究的回顾,分析总结了该研究领域的新进展及需要解决的问题,并对背景噪声干涉研究的新特点进行了分析和展望。
Ambient noise seismic interferometry is the methodology by which the Green＇s Function between two seismic stations can be extracted from long time cross correlation of ambient noise recorded by these two stations.Recent years,seismic interferometry based on ambient noise gains lots of advances both in theoretical derivations and practical applications,including ambient noise tomography as well as time lapse monitoring of velocity variations and many others.In this paper,we first give a brief introduction to the concept and theory of seismic interferometry,then put more words on the new advances in its applications.After introduction and discussion on the advances and barriers related to research on ambient noise source properties,phase and amplitude of noise cross correlation function,we show the new trend in ambient noise interferometry processing.
出处
《中国地震》
CSCD
北大核心
2011年第1期1-13,共13页
Earthquake Research in China
基金
中国地震局地球物理研究所基本科研专项(DQJB10A01
DQJB10B20
DQJB11C05)
国家自然科学基金(41004019
40874095)共同资助
关键词
背景噪声
互相关
格林函数
地震成像
Ambient noise Cross-correlation Green function Seismic imaging
