LARSE II: A Seismic Profile Through the 1994 Northridge Earthquake Epicentral Region and Central Transverse Ranges

这项研究包括完成从南加州大陆边界的圣卡塔利娜岛到西部莫哈韦沙漠的区域地震剖面，该剖面于1994年开始作为LARSE I（洛杉矶地区地震实验）的一部分。这笔钱将为实验提供资金，其余资金将来自南加州地震中心和美国地质调查局。新的剖面，LARSE II，穿过大陆内部边界，圣莫尼卡山脉，北岭地震震中区域，圣苏珊娜山脉和圣安德烈亚斯断层。调查参数将允许确定上地幔和下地壳结构，以及山脉和盆地的结构和速度。在第一种情况下，地震层析成像检测到的地壳下岩石圈和上地幔高速异常之间的关系特别令人感兴趣。主要的地壳目标包括北岭地震隐伏断层、圣莫尼卡和圣苏珊娜山脉下逆冲断层以及圣费尔南多盆地的速度结构。这项研究是国家减少地震危害计划的一个组成部分。＊＊＊

9725413 Henyey This research involves the completion of a regional seismic profile from Santa Catalina Island in the southern California Continental Borderland to the western Mojave Desert that began as part of LARSE I (Los Angeles Region Seismic Experiment) in 1994. This will fund of the cost of the experiment with the remainder to come from the Southern California Earthquake Center and U.S. Geological Survey. The new profile, LARSE II, crosses the inner continental borderland, Santa Monica Mountains, Northridge earthquake epicentral region, Santa Susana Mountains, and the San Andreas fault. The survey parameters will allow the determination of both the upper mantle and lower crustal structure, as well as the structure and velocities of the mountains and basins. In the first case, the relationship between the subcrustal lithosphere and upper mantle high-velocity anomaly detected by earthquake tomography is of particular interest. The primary crustal targets include the buried Northridge earthquake fault, and the thrust faults beneath the Santa Monica and Santa Susana Mountains, as well as the velocity structure of the San Fernando basin. This research is a component of the National Earthquake Hazard Reduction Program. ***