MARGINS FELLOWSHIP: The effect of frictional properties in subduction zones on earthquake triggerability

这是一个MARGINS博士后研究项目。博士后将研究断层带厚度如何影响俯冲带的大规模断层稳定性。具体要完成的任务是：1.对北方哥斯达黎加、南方哥斯达黎加和南海俯冲带的余震生产力的评估，以确定具有不同摩擦特性的俯冲带之间的稳定性差异。2.通过对大地震波形进行高通滤波对哥斯达黎加边缘远距离触发的可能性进行调查。3.发展分析模型，显示断层泥厚度、力链、粗糙接触和临界滑动距离之间的关系，在临界滑动距离上，断层减弱到足以动态地破坏。 这是一个为期两年的雄心勃勃的项目，但如果成功，将有助于我们了解在各种俯冲环境中应变是如何建立的，以及应变必须被释放的频率，以及这些事件如何被触发。该项目的潜在更广泛的影响包括提高我们对地震触发的理解以及培训有前途的年轻女性研究人员方面的社会效益。

This is a MARGINS post-doctoral fellowship project.The post-doc will investigate how fault zone thicknesses affects large-scale fault stability at subduction zones. The specific tasks to be accomplished are: 1. Assessment of aftershock productivity on the Northern Costa Rican, Southern Costa Rican, and Nankai subduction zones to establish stability differences between subduction zones with varying frictional properties. 2. Investigation of the potential for remote triggering at the Costa Rican margin through high pass filtering of large earthquake waveforms. 3. Development of analytical models showing the relationships between fault gouge thickness, force chains, asperity contact and the critical slip distance over which a fault weakens enough to fail dynamically. This is an ambitious project for two years, but if successful will help us understand how strain builds in various subduction settings, and how frequently the strain must be relieved as well as how such events can be triggered.The potential broader impacts of this project include the benefit to society with respect to improving our understanding of earthquake triggering as well as the training of a promising young female researcher.