Fine Structure of the Mantle from Global Broadband Studies

9902995 Vidale该项目将系统地分析全球宽带和选定的区域数据，以解决有关地球地幔状态的问题，采用新的方法和更高的分辨率。 第一个项目致力于通过观测P和PP之间的散射波来了解整个地幔中小尺度（~10 km）不均匀性的分布。 全球地震台网数据库中许多P波列的包络叠加显示出能量作为范围和到达时间的函数的诊断模式。 大量的区域网络观测将通过为少数地区提供更高分辨率的观测来增强分析。 单次和多次散射理论的建模将提供散射体强度作为整个地幔深度的函数。 第二项任务是利用反射相位分析核幔边界。 我们已经确定了超过20，000到达的PcP和ScP，并将试图映射的幅度和频率的空间变化的核心反射内容。 此外，我们已经获得了许多西海岸区域阵列记录的核心反射，这可以提供高分辨率的结果，有限的地区的CMB。

9902995VidaleThis project will sysematically analyze global broadband and selected regional data to addressquestions about the state of the Earth's mantle with new methods and greater resolution. The first project strives to understand the distribution of small-scale (~10 km) heterogeneity throughout the mantle using observation of scattered waves between P and PP. Envelop stacks of many P wave trains in the global seismic network database show diagnostic patterns of energy as a function of range and arrival time. Stacks of regional network observations will augment the analysis by providing higher-resolution observations for a few locales. Modeling with single and multiple scattering theories will provide a profile of scatterer strength as a function of depth in the entire mantle. The second task will be the analysis of the core-mantle boundary by reflected phases. We have identified more than 20,000 arrivals of PcP and ScP and will attempt to map the spatial variability of amplitude and frequency content of core reflections. In addition, we have obtained numerous West Coast regional array recordings of core reflections, which can provide high-resolution results for limited areas of the CMB.