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

本研究是利用圣路易斯大学地震仪台网研究新马德里板内地震带的非均质性。一种新的级数展开方法将用于从小于2.5级的小地震中开发震源位置的格林路径函数。然后，将格林函数方法应用于新马德里地区更大的地震，研究破裂特性的时空变化。第二次调查将利用s波尾波来绘制新马德里地震带的三维Q结构。这些研究应该提供关于新马德里地震震源区内和附近非均质性性质的见解。这对了解板内地区的地震过程和评估地震危险性都很重要。这项研究是国家减少地震危害计划的一个组成部分。

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.