Mapping Attenuative Dispersion of Seismic Body Waves in and Around the New Madrid Seismic Zone

绘制新马德里地震带及其周边地区地震体波的衰减频散图

• 批准号: 9706720
• 负责人: Brian Mitchell
• 金额: $ 7.16万
• 依托单位: Saint Louis University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-11-15 至 1998-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9706720&HistoricalAwards=false
• 关键词: Mapping; Attenuative; Dispersion; Seismic; Body; Mapping; Attenuative; Dispersion; Seismic; Body

9706720 Mitchell This research involves the mapping of attenuative dispersion along paths through the source zone of New Madrid earthquakes as well as along paths outside of, but contiguous to, that zone. Both theoretical and observational research has shown that waves which have been attenuated by either intrinsic anelasticity or by scattering processes also exhibit dispersion. Attenuative dispersion associated with regional seismic phases has been found to be easily measurable in regions where those phases attenuate rapidly with distance. Abundant amounts of data obtained from PANDA stations, as well as from USNSN stations, in and surrounding the New Madrid seismic zone should be available for these studies. Relating the variation of Q to the properties of the crust may provide new information on earthquake processes in the New Madrid region. This research is a component of the National Earthquake Hazard Reduction Program. ***

9706720 Mitchell这项研究涉及沿着新马德里地震的源区以及沿着该区域外部但连续的路径的路径区域的衰减分散映射。 理论和观察性研究都表明，内在的无弹性或通过散射过程减弱的波也表现出分散。 发现与区域地震阶段相关的衰减分散体在这些阶段随着距离迅速减弱的区域中很容易测量。 从熊猫站以及来自USNSN的站，新马德里地震带的大量数据应用于这些研究。 将Q与地壳的性质的变化有关，可以提供有关新马德里地区地震过程的新信息。 这项研究是国家地震危害计划的组成部分。 ***