Mapping Azimuthal Anisotropy in the United States from LRSM Data

根据 LRSM 数据绘制美国的方位各向异性图

• 批准号: 9506607
• 负责人: James Ni
• 金额: $ 9.25万
• 依托单位: New Mexico State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-15 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9506607&HistoricalAwards=false
• 关键词: Mapping; Azimuthal; Anisotropy; United; States

9506607 NI This research is to expand the current shear-wave splitting data in the U.S. through a comprehensive analysis of S and SKS, shear- wave splitting using the three-component short-period analog data from the Long Range Seismic Monitoring (LRSM) network which was in place during the 1960's. This analog data, which will be digitized and made available to the scientific community, presents a cost- effective and spatially extensive data set which will greatly facilitate mapping of seismic anisotropy across the U.S., effectively quadrupling the currently available measurements. Shear-wave splitting is a measure of seismic anisotropy which can be used to infer mantle strain associated with mantle flow and the relationship between subcontinental mantle deformation and crustal deformation, the driving force of earthquake occurrence. This research is a component of the National Earthquake Hazard Reduction Program. ***

9506607 NI 这项研究旨在通过对 S 和 SKS 进行综合分析，利用 1960 年代建立的远程地震监测 (LRSM) 网络的三分量短周期模拟数据进行剪切波分裂，从而扩展美国当前的剪切波分裂数据。 这些模拟数据将被数字化并提供给科学界，提供了一个具有成本效益和空间广泛的数据集，这将极大地促进美国各地地震各向异性的绘图，有效地将当前可用的测量数据增加四倍。 剪切波分裂是地震各向异性的一种度量，可用于推断与地幔流相关的地幔应变以及次大陆地幔变形与地壳变形（地震发生的驱动力）之间的关系。 这项研究是国家地震减灾计划的一部分。 ***