P-waves from cross-correlation of seismic noise
P-waves from cross-correlation of seismic noise
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DOI：
10.1029/2005gl023803
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发表时间：
2005-10-06
影响因子：
5.2
通讯作者：
Fehler, MC
中科院分区：
文献类型：
--
作者：
Roux, P;Sabra, KG;Fehler, MC
我们介绍了加利福尼亚州帕克菲尔德网络中各对电台之间地震噪声记录的交叉相关性的结果。当在短范围内在许多电台对上进行执行时，噪声相关函数（NCF）是与主动源制造的镜头收集的被动类似物。我们证明了NCF中的P波和瑞利波的存在。时间频率分析使我们能够将两个通过它们的极化进一步识别的波数据包分开。从NCF估算了到达时间，它们在区域速度模型中使用射线追踪进行了有利的预测，并与整个San Andreas断层的速度梯度进行了比较。
We present results from the cross- correlations of seismic noise recordings among pairs of stations in the Parkfield network, California. When performed on many station pairs at short ranges, the noise correlation function ( NCF) is the passive analog to a shot gather made with active sources. We demonstrate the presence of both a P- wave and a Rayleigh wave in the NCF. A time- frequency analysis allows us to separate the two wave packets that are further identified through their polarization. Arrival times were estimated from the NCF and they compared favorably with predictions using ray tracing in a regional velocity model and with the velocity gradient across the San Andreas Fault.