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。通过比较不同特征的俯冲带之间最大力矩释放的位置，并将它们与各种俯冲带参数进行关联，将揭示影响力矩释放局部化的物理过程的信息。确定不同震级的地震是否破裂了板块界面上的相同区域，对于理解断层强度在力矩释放局部化中所起的作用是重要的。由于大地震是俯冲带力矩释放的主要来源，它们对地震行为的影响对于理解力矩释放的局部化是至关重要的。这项研究是国家减少地震灾害计划的一部分。

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.