Spontaneous Rupture Sequences on Non-Planar Elastodynamic Faults: The Interaction of Geometrical Heterogeneities and Stress Heterogeneities and the Observable Consequences

长期以来，断层中的几何和材料非均质性一直被视为影响地震行为的一个重要特征。最近，应力非均质性的作用已经开始被认为是一个潜在的核心特征，特别是有证据表明，单靠应力非均质性已经可以在均匀的平面断层上产生一组非常丰富和复杂的类似地震的行为。缺少的是对两种类型的非均质性--静态几何和材料非均质性以及动态应力非均质性--如何组合和相互作用以产生更真实的行为的理解。在我们成功地将复杂断层系统的物理模型与重复事件的弹性动力学相结合的早期工作的基础上，我们正在努力继续这条关于几何和动力学异质性相互作用的研究路线。我们正在努力通过进一步发展从标量到张量情况的建模能力来进一步发展理论，并通过探索可观察到的后果来进一步发展我们测试理论的能力。

ShawEAR-0229834Geometrical and material heterogeneities in faults have long been viewed as a crucial feature affecting earthquake behavior. More recently, the role of stress heterogeneities has begun to be recognized as a potentially central feature, particularly with the demonstration that stress heterogeneities alone already can produce a remarkably rich and complex set of earthquake-like behaviors on uniform planar faults. What is missing is an understanding of how the two types of heterogeneities, the static geometrical and material heterogeneities, and the dynamic stress heterogeneities, might combine and interact to produce even more realistic behavior. Building from earlier work in which we successfully integrated physical models of complex fault systems with the elastodynmics of repeating events, we are working to continue this line of research of the interaction of geometrical and dynamical heterogeneities. We are working to both further develop the theory, by further developing the modeling capability to extend from the scalar to the tensor case, and to further develop our ability to test the theory, by exploring the observable consequences.