Shear-Wave Splitting and Tectonics from Teleseismic Arrivals at Seismic Stations in Western North America

这项研究是为了测量北美西部的剪切波分裂，以推断地幔中橄榄石的排列和相关的地幔流动模式。这些模式对岩石圈变形、绝对板块运动和相关的地震灾害都有影响。在这项正在进行的研究的继续中，将通过直接为各向异性参数反演一套地震记录来提高处理两个各向异性层的能力。然后将得到的厚度与由远震P和S时间残差独立确定的厚度进行比较。这项研究是国家减少地震灾害计划的一部分。

This research is to measure shear-wave splitting in western North America to infer alignment of olivine in the mantle and associated mantle flow patterns. These patterns have implications on lithospheric deformation, absolute plate motion and associated earthquake hazards. In this continuation of an ongoing study, an improvement in the ability to handle two anisotropic layers will be made by inverting a suite of seismograms directly for the anisotropic parameters. The derived thicknesses can then be compared with those independently determined by means of teleseismic P and S time residuals. This research is a component of the National Earthquake Hazard Reduction Program.