Identification and Analysis of Locked Asperities Along Tectonic Faults

这项研究从闭锁断裂带的几何和应力角度解释了地震活动和大地测量数据，这些断裂带在大地震中会破裂。这些研究将在粗糙模型的框架下进行，该模型认为地震活动断裂带的一部分被有效地锁定以防止滑动，但在大地震中除外，而该断裂带的相邻部分在地震中滑动，或具有较低的地震活动，并且不积累可比较的应力。最初的重点将是对阿拉斯加舒马金群岛俯冲部分和圣安德烈亚斯断层沿线的帕克菲尔德地区进行建模。这项研究是国家减少地震灾害计划的一部分。

This research interprets seismicity and geodetic data in terms of the geometry and stressing of locked fault zones which will rupture in large earthquakes. The studies will be carried out in the framework of the asperity model which regards a portion of a seismically active fault zone as being effectively locked against slip, except in large earthquakes, while adjacent portions of the zone slip aseismically, or with lower level seismicity, and do not accumulate comparable stress. The initial focus will be on modelling of the Shumagin Islands subduction segment in Alaska, and the Parkfield region along the San Andreas fault. This research is a component of the National Earthquake Hazard Reduction Program.