Experiments in Imaging Core-Mantle Boundary Scatterers Using Global Seismic Data

9507994 Hedlin这项研究的目的是分析全球台网记录的核内地震震相pKp(Df)的短周期前兆记录，以测试在核幔边界或附近直接成像小散射体的可行性。人们的期望是，为地壳散射问题开发的迁移技术可以用来将前兆能量从自由表面反投射到CMB。一个目标是确定我们有足够分辨率的区域，以成像小规模的CMB散射体，并区分核心入口点和出口点结构。在综合实验之后，将对全球地震台网所有可用的短周期和宽带资料中的pKp(Df)前兆进行综合分析。这项研究是地球深部合作研究计划的组成部分。***

9507994 HEDLIN This research is to analyze global network recordings of short- period precursors to the inner-core seismic phase PKP(DF) in order to test the feasibility of directly imaging small scatterers at or near the core-mantle boundary (CMB). The expectation is that migration techniques developed for crustal scattering problems can be used to back-project precursor energy from the free-surface to the CMB. A goal is to identify areas in which we have sufficient resolution to image small-scale CMB scatterers and to discriminate between core entry and exit point structure. Following synthetic experiments, a comprehensive analysis will be done of PKP(DF) precursors in all available short-period and broadband data from the global seismic networks. This research is a component of the Cooperative Studies of the Earth's Deep Interior program. ***