• ISSN 2097-1893
  • CN 10-1855/P

一种估计环境噪声互相关中台间相速度与群速度频散的联合方法

R. Hawkins M. Sambridge 冯刚 王凌 高翔 赵爱华

引用本文: 冯刚, 王凌, 高翔. 一种估计环境噪声互相关中台间相速度和群速度频散的联合方法. 世界地震译丛.51(6):699-715. doi:10.16738/j.cnki.issn.1003-3238.202006005

一种估计环境噪声互相关中台间相速度与群速度频散的联合方法

  • 摘要: 本文提出了一种联合提取勒夫波和瑞利波的群速度与相速度频散的方法。该方法以谱元的形式表示路径平均地球模型,地球模型以密度、横波速度、径向各向异性和VP/VS比等参数表征。为防止误判相位,首先使用启发式方法自动估计一个初步的频散曲线;然后,在频率域对台站对之间的噪声相关函数(NCF)进行更准确的拟合。对于信噪比较好的高质量互相关,该方法可以非常准确地拟合噪声相关函数的频谱,同时获得勒夫波和瑞利波相速度与群速度的可靠估计。另外,本文还介绍了如何利用雅可比矩阵的线性化近似来估计不确定性及其在层析成像反演中的应用。

     

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