Effects of Material Nonuniformity in Earthquake Faulting

9614357克尔这项研究涉及开发模型，以估计材料变化对地震断裂机制的影响。其目的是识别地表变形的特征，以区分均匀模型和非均匀模型，以便了解现场观测表明材料性质存在空间变化的地区的深层形变来源。将发展三维解析和数值技术来计算非均匀材料中的弹性场，以研究弹性模数的地下变化如何影响断层力学。将这些模型用于断层行为的模拟，将提供更真实的滑动诱导弹性场的计算，例如滑动带对自身和附近断层施加的应力状态的变化。这项研究是国家减少地震灾害计划的一部分。***

9614357 Kerr This research involves the development of models for estimating the effects of material variations on the mechanics of earthquake faulting. The objective is to identify characteristics of surface deformations for distinguishing between homogeneous and nonuniform models in order to understand deformation sources at depth in areas where field observations indicate spatial variations in material properties. 3-D analytical and numerical techniques will be developed for calculating elastic fields in nonuniform material to investigate how subsurface variations in elastic moduli influence fault mechanics. Use of these models in simulations of fault behavior will provide more realistic calculations of the slip induced elastic fields, such as the change of the stress state that a slip zone imposes on itself and nearby faults. This research is a component of the National Earthquake Hazard Reduction Program. ***