Imaging P‐to‐S conversions with multichannel receiver functions
Imaging P‐to‐S conversions with multichannel receiver functions
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DOI：
10.1029/1999gl900566
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发表时间：
1999-08
影响因子：
5.2
通讯作者：
S. Neal;G. Pavlis
中科院分区：
文献类型：
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作者：
S. Neal;G. Pavlis
我们提出了一种对宽带地震阵列记录的 P-to-S 转换相位进行直接成像的新方法。我们的方法基于传统的三分量阵列处理和接收器函数技术，并添加了基于空气平滑函数的加权堆栈。这将创建具有指定孔径的合成阵列，其图像点在阵列上连续变化。通过这种方法，可以将来自宽带站阵列的数据插值到任意精细的网格上。我们已将该技术应用于由位于科罗拉多州北部和怀俄明州南部的洛多尔宽带阵列记录的单个深部事件。所得图像显示了整个阵列中地壳结构的明显差异，并且还对主要的上地幔不连续性进行了成像。
We present a new methodology in the direct imaging of P‐to‐S converted phases recorded on broadband seismic arrays. Our approach is based on conventional three‐component array processing and receiver function techniques with the key addition of a weighted stack based on an aerial smoothing function. This creates synthetic arrays with a specified aperture whose image points vary continuously across the array. With this approach, it is possible to interpolate data from an array of broadband stations onto an arbitrarily fine grid. We have applied this technique to a single deep event recorded by the Lodore broadband array, located in northern Colorado and southern Wyoming. The resulting images show distinct differences in crustal structure across the array, and also image major upper mantle discontinuities.