Inhomogeneities in Source Zone Properties and Rupture Characteristics Along the New Madrid Fault

新马德里断层源区性质的不均匀性和破裂特征

• 批准号: 9105152
• 负责人: Brian Mitchell
• 金额: $ 11万
• 依托单位: Saint Louis University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-08-01 至 1994-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9105152&HistoricalAwards=false
• 关键词: Inhomogeneities; Source; Zone; Properties; Rupture

This research is to utilize the Saint Louis University seismometer network to study heterogeneities in the New Madrid intraplate earthquake zone. A new series expansion method will be use to develop path Green's functions on source locations from small, less than magnitude 2.5, earthquakes. Then, the Green's function method will be applied to larger earthquakes in the New Madrid region to study spatial/temporal variations in rupture properties. A second investigation will utilize the S-wave coda to map three-dimensional Q structure in the New Madrid seismic zone. These studies should provide insights on the nature of heterogeneities within and near the source zone of New Madrid earthquakes. This is important both for knowledge of earthquake processes in intraplate regions and for assessing earthquake hazard. This research is a component of the National Earthquake Hazard Reduction Program.

这项研究是利用圣路易斯大学地震仪网络来研究新马德里板内地震区的异质性。 将使用一种新的系列扩展方法来开发Green在源位置的源位置，而小于2.5幅度的地震。 然后，绿色的功能方法将应用于新马德里地区的较大地震，以研究破裂特性的空间/时间变化。 第二次调查将利用S波尾声来绘制新马德里地震区的三维Q结构。 这些研究应提供有关新马德里地震源区域内及其附近异质性本质的见解。 这对于了解内部区域中地震过程的知识以及评估地震危害都很重要。 这项研究是国家地震危害计划的组成部分。