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

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米切尔这项研究涉及沿穿过新马德里地震震源区的路径以及沿该区域外但毗邻的路径绘制衰减弥散图。理论和观测研究都表明，被固有滞弹性或散射过程衰减的波也表现出色散。与区域地震震相有关的衰减弥散在这些震相随距离迅速衰减的地区很容易测量。从新马德里地震带及其周围的熊猫观测站和USNSN观测站获得的大量数据应该可以用于这些研究。将Q的变化与地壳性质联系起来，可以为新马德里地区的地震过程提供新的信息。这项研究是国家减少地震灾害计划的一部分。***