Investigations of the Structure of the Inner Core and the Core-Mantle Boundary

这项研究是利用地震产生的数字化核心震相Pkp来研究已发现一些各向异性证据的内核，以及已知但解决不了非均质性的核-地幔边界。数据从国家地震信息中心分发的光盘和IRIS数据中心提取。为了消除地幔不均一性和震源错位的影响，这项研究将利用地幔中具有相似路径的震相之间的差异测量。振幅和时间都将被用来分析沿地球自转轴的内核结构。这些结果将被用来约束内核和核-地幔边界区域的各向异性和非均质性理论。

This research is to utilize digitized core phases PKP generated by earthquakes to study the inner core where some evidence of anisotropy has been found, and the core-mantle boundary where heterogeneity is known but poorly resolved. Data are extracted from CD-ROMS distributed by the National Earthquake Information Center and from the IRIS data center. In order to remove effects of mantle hetereogeneities and earthquake source mislocations, the research will utilize differential measurements between phases with similar paths in the mantle. Both amplitudes and times will be used to analyze inner core structure along the earth's spin axis. The results will be used to constrain theories of anisotropy and heterogeneity in the inner core and core-mantle boundary regions.