Collaborative Research on the Sumatran Subduction Zone and Great Sumatran Fault

[406781] Sieh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，是对苏门答腊岛两个巨大的板块边界断层的研究。由美国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。这项工作解决了关于大地震的可重复性和斜辐合板块边界的运动学的基本问题；研究结果将适用于美国加州、太平洋西北部和阿拉斯加的板块边界断层的地震危险。研究目标是：1)利用全新世晚期淹没和突出的珊瑚来绘制与苏门答腊俯冲带历史、古代和未来大地震相关的垂直变形图，并确定其年代；2)完成大苏门答腊右侧走滑断层的新构造图，并确定其晚第四纪的滑动速率。这项研究是国家减少地震危害计划的一个组成部分。＊＊＊

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. ***