Subsurface Geometry of Active Faults in the Southern San Andreas System

这项研究是一个正在进行的项目的延伸，该项目旨在成像与南加州圣安德烈亚斯系统相关的活动断层的地下几何图形。通过对现有的地震反射数据集进行叠前偏移，可以找到所映射的活动断裂的几何形状。成像的断层将与区域深部地壳结构有关，并测试泊松比从幅度与偏移量趋势变化的证据，表明构造活动的薄弱地带。EDGE和地壳项目的数据将用于调查圣玛丽亚盆地和特哈查皮山区。这项研究是国家减少地震灾害计划的一部分。

This research is an extension of an ongoing project to image the subsurface geometry of active faults associated with the San Andreas system in southern California. The geometry of mapped active faults will be found by pre-stack migration of existing seismic reflection datasets. The imaged faults will be related to regional deep crustal structures and tested for evidence of Poisson's ratio variations from amplitude-versus-offset trends, suggesting tectonically-active zones of weakness. Data from the EDGE and Calcrust projects will be used to investigate the Santa Maria Basin and Tehachapi Mountains areas. This research is a component of the National Earthquake Hazard Reduction Program.