Analysis of Scattering in Three-Dimensions Using Array Recordings of Local, Regional and Teleseismic Sources

这项研究将分析宽频率/波长地震阵列数据，以调查由本地、区域和远程地震距离的震源产生的散射波场和尾波的性质。对视速度、方向和极化的分析将允许估计散射源和在不同距离产生尾波的机制。P，S和面波尾波将被搜索，以了解不同距离的源，对于给定的源，在不同的时间，以及不同的散射类型，散射能量如何不同。三维数值模拟将被用来产生具有在阵列数据中观察到的特征的散射波场。结果应该显示地震尾波的产生是如何与地球结构有关的，以及这些结构如何在非常宽的频率/波长范围内影响波的传播。

This research will analyze broad frequency/wavelength seismic array data to investigate the nature of the scattered wavefield and coda produced by sources at local, regional, and teleseismic distances. Analysis of apparent velocity, direction, and polarization will allow estimation of scattering sources and mechanisms producing coda for sources at various distances. P, S and surface wave coda will be searched to see how scattered energy differs for sources at different distances, at different times for a given source, and with scattering type. Three-dimensional numerical modeling will be used to produce scattered wavefields with characteristics observed in the array data. Results should show how production of seismic coda, a proposed earthquake prediction parameter, is related to earth structure and how these structures affect wave propagation over a very broad frequency/wavelength range.