Numerical and Field Experiments of Fault Zone Trapped Modes

本研究旨在开发一种利用地震波在断裂带的低速波导内传播的方法来绘制断裂带的几何形状和内部性质的新技术。对于像圣安德烈亚斯断层这样的垂直断层，传统的地震反射和折射技术并没有取得太大的成功。利用被困模的色散特性可以更好地圈定断裂带，更好地理解震源破裂过程和地震发生过程。这项工作将包括实地观测和捕获模式的理论建模。这项研究是国家减少地震危害计划的一个组成部分。

This research is to develop a new technique for mapping the geometry and internal properties of fault zones by means of seismic waves travelling inside the low-velocity wave guide of the fault zone. For vertical faults such as the San Andreas, conventional seismic reflection and refraction techniques have not met with much success. The use of dispersive properties of trapped modes should lead to a better delineation of the fault zone, and a better understanding of the source rupture process and the process of earthquake occurrence. The work will consist of both field observations and theoretical modeling of the trapped modes. This research is a component of the National Earthquake Hazard Reduction Program.