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

利用全球地震数据对核幔边界散射体成像的实验

• 批准号: 9628020
• 负责人: Michael Hedlin
• 金额: $ 11.5万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-01 至 1999-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9628020&HistoricalAwards=false
• 关键词: Experiments; Imaging; Core; Mantle; Boundary

9628020 Hedlin This research is to analyze global network recordings of precursors to the inner core seismic phase PKPdf in order to directly image lateral and vertical variations in short period scattering strength at or near the core-mantle boundary (CMB). Results to date have produced evidence for large scale variations in scattering strength near the CMB. This work will investigate inversion techniques that will form images of scattering strength that are less subject to travel time ambiguities. Resolution analysis will especially concentrate on distinguishing between scatters at core entry and exit points and within the D" layer just above the CMB. ***

小行星9628020 这项研究是为了分析全球网络记录的前兆内核地震相PKPdf，以直接图像的横向和垂直变化的短周期散射强度在或附近的核幔边界（CMB）。 迄今为止的结果已经产生的证据，大规模的变化，在散射强度附近的CMB。 这项工作将调查反演技术，将形成图像的散射强度，是较少受到旅行时间的模糊性。 分辨率分析将特别集中于区分核心入口和出口点处的散射和CMB上方的D”层内的散射。 ***