Dynamic Ruptures in Fault Zones with Material Contrasts and Geometrical and Rheological Heterogeneities

本项目研究含物质界面、几何不连续和流变非均质的断裂带结构的动态破裂。这些研究将结合和扩展以前的二维计算模型，并为相关计算开发一个基本的三维框架。正如之前的工作所示，在动态破裂计算中纳入材料界面导致了许多在横向均匀固体中不存在的新现象：沿着材料界面的动态破裂因此可以潜在地解释许多重要的地球物理问题，包括热流悖论，地震滑动的短上升时间，以及在现有断裂带中捕获破裂。本研究中对泥断层层、断层偏移、更真实的流变学和增加的维度的进一步研究可能会修改以前的一些结果。本项目将定量地考察这些差异及其对地震破坏过程和相关地震辐射的影响。

9903049Ben-ZionThis project is to study dynamic ruptures in fault zone structures containing material interfaces, geometrical discontinuities, and rheological heterogeneities. The studies will combine and extend previous 2D computational models and develop a basic 3D framework for related calculations. As shown in the previous work, the incorporation of a material interface in calculations of dynamic rupture leads to a host of new phenomena that do not exist in a laterally homogeneous solid: dynamic rupture along a material interface can thus potentially provide an explanation for a number of important geophysical problems including the heat flow paradox, short rise time of earthquake slip, and trapping of rupture in existing fault zones. The additional incorporation in this study of a gouge layer, fault offsets, more realistic rheology, and increased dimensionality may modify some of the previous results. This project will examine quantitatively these differences and their consequences for the earthquake failure process and associated seismic radiation.