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

[9416326] Hager这个项目将评估断层传播褶皱（FPF）模型在了解潜在地震灾害中的应用。FPF模型的运动学通常用于解释与盲逆冲有关的地震的发生，但FPF模型的力学研究相对较少。这项研究将首先确定Northridge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非弹性变形。这些发现将被纳入一个有限元模型，以产生一个替代FPF的力学模型。基底剥离断层是FPF模型的先决条件，它是否必要，甚至是否能够产生大地震，将被确定。这项研究的结果将有助于了解地震力学、洛杉矶盆地和圣费尔南多谷地下结构的几何形状，以及盲冲带地区潜在的地震危险。

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.