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

断层的几何和物质非均质性长期以来被认为是影响地震行为的一个重要特征。最近，应力不均匀性的作用已经开始被认为是一个潜在的中心特征，特别是有证据表明，应力不均匀性本身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。我们缺少的是如何理解这两种类型的非均质，即静态几何和材料的非均质，以及动态应力的非均质，如何结合和相互作用以产生更真实的行为。在早期工作的基础上，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结合起来，我们正在努力继续研究几何和动力学异质性的相互作用。我们正在努力进一步发展这一理论，通过进一步发展从标量到张量的建模能力，并通过探索可观察到的结果，进一步发展我们测试这一理论的能力。

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.