Examination of the Fault-Propagation Fold Model for Seismic Hazard, LA and Ventura Basins

9416326该项目将评估断层传播褶皱(Fpf)模型在了解潜在地震危险方面的应用。通常用FPF模型的运动学来解释与盲冲有关的地震的发生，但对FPF模型的力学研究相对较少。这项研究将首先确定北岭事件破裂面的几何形状和同震滑动，然后确定是否允许或需要较慢的滞弹性变形。这些发现将被合并到有限元模型中，以产生FPF的替代力学模型。将确定是否需要或甚至能够产生大地震，作为FPF模型的先决条件的基底滑脱断层。这项研究的结果将有助于理解地震力学、洛杉矶盆地和圣费尔南多山谷下构造的几何形状，以及盲目冲断区域的潜在地震危险。

9416326 Hager This project will assess the application of the fault propagation fold (FPF) model to understanding potential earthquake hazards. The kinematics of the FPF model are commonly used to explain the occurrence of earthquakes in connection with blind thrusts, but the mechanics of the FPF model have received relatively little study. This study will first determine the geometry and co-seismic slip of the rupture plane of the Northridge event, then determine whether slower anelastic deformation is either permitted or required. These finding will be incorporated into a finite element model to produce an alternative mechanical model to the FPF. It will be determined if a basal detachment fault, a prerequisite of the FPF model, is necessary or even capable of generating large earthquakes. The results of this study will aid understanding of earthquake mechanics, the geometry of the structures beneath the Los Angeles basin and San Fernando Valley, and the potential for earthquake hazards in regions of blind thrusts.