Seismic Strain Along the San Adreas Fault System

本研究将探讨三维地震应变和应力 是沿着圣安德烈亚斯断层系统沿着距离的函数。 一 张量地震应变场的移动平均值和 将使用现有地震网络数据计算应力。 结果将与详细的断层几何形状，蠕变速率， 与早期大地震在时间和空间上的接近程度， 将与断层的数值模型进行比较。 初步 结果表明，主压缩率约为 垂直于蠕变率高的断层，但倾斜于 断层呈蠕动状福尔斯向北倾斜。 变化 沿断层长度的张量应变分量沿着出现相关 到故障结束，但也系统地改变作为一个功能， 蠕变率 这项研究是国家 减少地震灾害计划。

This research will investigate the 3-D seismic strain and stress as a function of distance along the San Andreas fault system. A moving average of the tensoral seismic strain field and state of stress will be computed using the existing seismic network data. Results will be related to detailed fault geometry, rates of creep, temporal and spatial proximity to earlier large earthquakes, and will be compared to numerical models of the fault. Preliminary results indicate that the principal compression is approximately normal to the fault where rates of creep are high, but oblique to the fault as creep falls off toward the north. Variation of tensoral strain components along the fault length appear related to fault ends, but also systematically change as a function of creep rate. This research is a component of the National Earthquake Hazard Reduction Program.