Collaborative Research on the Sumatran Subduction Zone and Great Sumatran Fault

9406781这项研究是由加州理工学院、明尼苏达大学和德克萨斯大学合作进行的，是对苏门答腊岛的两个巨大的板块边界断层的研究。由国家科学基金会资助的初步研究表明，这些项目具有很高的潜力。这项工作解决了与大地震的重复性和倾斜收敛的板块边界的运动学有关的基本问题；结果将适用于美国加利福尼亚州、太平洋西北部和阿拉斯加板块边界断层的地震风险。目标是：1)利用苏门答腊岛俯冲带历史上、古代和未来发生的大地震，利用晚全新世的水下珊瑚绘制垂直形变地图并确定其年代；2)完成苏门答腊岛右旋走滑大断裂的新构造图，并确定其第四纪晚期的滑动速率。这项研究是国家减少地震灾害计划的一部分。***

9406781 Sieh This research, which is a collaboration between the California Institute of Technology, the University of Minnesota and the University of Texas, is a study of the two great plate-boundary faults of Sumatra. Preliminary studies funded by the NSF demonstrate the high potential of these projects. The work addresses fundamental questions concerning both the repeatability of great earthquakes and the kinematics of obliquely convergent plate boundaries; results would apply to earthquake hazard at plate-boundary faults in the U.S. in California, the Pacific Northwest and Alaska. The goals are 1) to use submerged and emergent late Holocene corals to map and to date vertical deformations associated with great historical, ancient and future earthquakes of the Sumatran subduction zone and 2) to complete a neotectonic map of the right-lateral strike-slip Great Sumatran fault and to determine its late Quaternary rates of slip. This research is a component of the National Earthquake Hazard Reduction Program. ***