Kirchoff Coda Migration of Regional Network Data

区域网络数据的 Kirchoff Coda 迁移

• 批准号: 9417493
• 负责人: Justin Revenaugh
• 金额: $ 9.91万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-03-01 至 1998-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9417493&HistoricalAwards=false
• 关键词: Kirchoff; Coda; Migration; Regional; Network

9417493 Revenaugh This research is to study the early portion of seismic high frequency records dominated by complicated ground motions comprising the coda of the direct body wave phases. Energy within the coda derives from many sources, including: source region heterogeneity, mantle multipathing, and local site response, the latter being an important contributor to strong ground motion and, hence, to seismic hazard. Recent work has drawn attention to the role of scattering from topography and fault zone heterogeneity - often 10's of kilometers away - in producing energetic coda arrivals for large, local earthquakes. Data from a number of seismograph networks will be analyzed using a variant of Kirchoff migration. Once specific sites of high scattering potential have been identified, their contribution to seismic hazard can be further examined with short-term deployments of portable seismographs. This research is a component of the National Earthquake Hazard Reduction Program. ***

[9417493]本研究的目的是研究以复杂地震动为主的地震高频记录的早期部分，包括直接体波相位的尾波。尾波中的能量有很多来源，包括：震源区域非均质性、地幔多路径和局部场地响应，后者是强地面运动和地震危险的重要因素。最近的工作引起了人们对地形和断层非均匀性的散射作用的关注——通常在10公里之外——在产生大的局部地震的高能尾波到达中所起的作用。来自多个地震仪网络的数据将使用一种不同的基尔霍夫偏移进行分析。一旦确定了高散射潜力的特定地点，就可以通过短期部署便携式地震仪进一步检查它们对地震危害的贡献。这项研究是国家减少地震危害计划的一个组成部分。＊＊＊