利用SSR法研究钟祥台Lg波尾波衰减特征

Exploring the Attenuation Characteristics of Coda Wave of Lg-Wave at Zhongxiang Seismic Station by Using Stack Spectral Ration Method

利用单台叠加谱比法(SSR)分析钟祥台记录的周边地区30个地震事件的垂直分量,得出与各个射线对应的Lg波尾波的Q_(0)值。结果表明,Q_(0)值的大小与构造活动强弱有关,在构造活动强烈的胡集-沙洋断裂、通城河断裂、天阳坪断裂、青峰断裂附近呈现出低值,约在130~200范围内变化;在远离断裂的区域,构造活动比较稳定,Q_(0)值达到600以上。

We use the stack spectral ration method to explore thirty vertical components of earthquake data recorded by Zhongxiang seismic station,gaining the corresponding Q_(0) values of coda wave of Lg-wave for each radiation path.Results show that the values of Q_(0) have to do with the tectonic activity.In the active regions among Huji-Shayang fault,Tongchenghe fault,Tianyangping fault and Qingfeng fault,the Q_(0) manifest low values change from 130 to 200,but away from the activity regions of fault,the tectonic activity is stable,and Q_(0) is as high as 600.