Earthquake Geology of the Sumatran Subduction Zone and Great Sumatran Fault

这项研究将对印度尼西亚苏门答腊岛的两个主要断裂带进行地质研究，同时对该地区正在进行的大地测量研究进行协调。对抬升的珊瑚礁进行测年，以记录两次历史上的俯冲带大地震及其史前前身的时间、地理范围和抬升，应能准确和完整地记录该区域的大俯冲带地震。苏门答腊岛右侧的断层将通过苏门答腊岛火山弧中可测定年代的火山碎屑沉积的偏置通道来确定年代。这项研究将解决地震力学和新构造学中的基本问题，并为苏门答腊岛的地震危险性评估提供更坚实的基础。这项研究是国家减少地震灾害计划的一部分。

This research is to conduct geological studies of the two principal fault zones of Sumatra, Indonesia, in concert with ongoing geodetic studies of the region. Dating of uplifted coral reefs to document the timing, geographical extent and uplift of two great historical subduction-zone earthquakes and their prehistoric predecessors should provide a precise and complete record of great subduction zone earthquakes in the region. The right-lateral Sumatran fault will be dated by offset channels of datable pyroclastic deposits from the Sumatran volcanic arc. The research will address fundamental issues in earthquake mechanics and neotectonics and provide a firmer basis for seismic hazard evaluation in Sumatra. This research is a component of the National Earthquake Hazard Reduction Program.