Analysis of Scattering in Three-Dimensions Using Array Recordings of Local, Regional and Teleseismic Sources

利用局地、区域和远震源的阵列记录进行三维散射分析

• 批准号: 9304470
• 负责人: Gregory Wagner
• 金额: $ 5.41万
• 依托单位: University of South Carolina at Columbia
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-09-01 至 1996-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9304470&HistoricalAwards=false
• 关键词: Analysis; Scattering; Three; Dimensions; Using

This research will analyze broad frequency/wavelength seismic array data to investigate the nature of the scattered wavefield and coda produced by sources at local, regional, and teleseismic distances. Analysis of apparent velocity, direction, and polarization will allow estimation of scattering sources and mechanisms producing coda for sources at various distances. P, S and surface wave coda will be searched to see how scattered energy differs for sources at different distances, at different times for a given source, and with scattering type. Three-dimensional numerical modeling will be used to produce scattered wavefields with characteristics observed in the array data. Results should show how production of seismic coda, a proposed earthquake prediction parameter, is related to earth structure and how these structures affect wave propagation over a very broad frequency/wavelength range.

本研究将分析宽频/波长地震 阵列数据以研究散射波场的性质， 由当地、区域和地区来源产生的尾波 的距离. 分析视速度、方向和 偏振将允许估计散射源， 在不同距离产生源尾波的机制。 P、S 和表面波尾波将被搜索，看看散射的能量 在不同的距离，不同的时间， 一个给定的源，并与散射类型。 三维 数值模拟将用于产生散射波场 具有在阵列数据中观察到的特征。 结果应 显示了地震尾波的产生， 预测参数，是与地球结构，以及如何这些 结构影响波在一个非常广泛的传播 频率/波长范围。