Investigation of the Localization of Seismic Moment Release at Subduction Zones

本研究旨在探讨控制俯冲带力矩释放局部化的因素。通过比较不同特征俯冲带最大释放力矩的位置，并将其与各种俯冲带参数进行对比，揭示影响最大释放力矩定位的物理过程信息。确定震级非常不同的地震是否在板块界面上的同一区域破裂，对于理解断层强度在矩释放局部化中所起的作用是重要的。由于大地震占了俯冲带矩释放的大部分，因此大地震对地震行为的影响对于了解矩释放的局部化至关重要。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 investigate the factors that control the localization of moment release at subduction zones. By comparing the positions of maximum moment release between subduction zones with different characteristics and correlating them with a variety of subduction zone parameters, information on the physical processes that influence the localization of moment release will be revealed. Determination of whether earthquakes of very different magnitudes rupture the same regions on the plate interface is important in understanding the role that fault strength plays in the localization of moment release. Since great earthquakes account for the majority of moment release at subduction zones, their influence on seismic behavior is essential to understanding the localization of moment release. This research is a component of the National Earthquake Hazard Reduction Program.