Surface wave tomography from microseisms in Southern California
Surface wave tomography from microseisms in Southern California
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DOI：
10.1029/2005gl023155
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发表时间：
2005-07-26
影响因子：
5.2
通讯作者：
Fehler, MC
中科院分区：
文献类型：
--
作者：
Sabra, KG;Gerstoft, P;Fehler, MC
由于已经证明可以从地震噪声中提取点到点地震传播绿色函数，因此应该可以使用环境噪声场对地球结构成像。使用来自南加州148个宽带地震台站的地震噪声数据来提取网络中所有台站对之间的面波到达时间。地震数据，然后在一个简单的，但密集采样层析过程中使用的频率范围为0.1-0.2 Hz的南加州的一个地区内估计的面波速度结构。结果与以前使用更传统和精细的反演程序获得的估计相比毫不逊色。这表明，台站对之间的相干噪声场可以用于地震成像目的。
Since it has already been demonstrated that point-to-point seismic propagation Green Functions can be extracted from seismic noise, it should be possible to image Earth structure using the ambient noise field. Seismic noise data from 148 broadband seismic stations in Southern California were used to extract the surface wave arrival-times between all station pairs in the network. The seismic data were then used in a simple, but densely sampled tomographic procedure to estimate the surface wave velocity structure within the frequency range of 0.1-0.2 Hz for a region in Southern California. The result compares favorably with previous estimates obtained using more conventional and elaborate inversion procedures. This demonstrates that coherent noise field between station pairs can be used for seismic imaging purposes.