Imaging the Deep Roots of the San Andreas Fault

0454283公园圣安德烈斯断层的深层根源成像驱动地震的力量是全球性的，是板块运动的结果，但我们并不总是知道它们是如何与地表断层耦合的。 SAFOD项目旨在详细研究地震的产生过程，但规模很小。为了使SAFOD的结果适用于其他地区，我们还需要知道当地地震过程和全球板块运动之间的联系。 本项目将利用大地电磁法，通过监测天然电磁场来探测更多的区域构造。该方法的优点是能够检查地壳各个层次的结构，使我们能够检查地表的断层运动如何与深部的板块运动联系起来。 这个项目有来自德国的国际合作者。

0454283ParkImaging the Deep Roots of the San Andreas FaultForces driving earthquakes are global ones resulting from plate motion, but we do not always know how they couple to the faults at the surface. The SAFOD project is designed to examine in great detail the processes that generate earthquakes, but on a very small scale. In order for the results from SAFOD to be applicable to other areas, we also need to know the connection between the local earthquake processes and global plate motions. This project will use the magnetotelluric method to sense the more regional structure by monitoring natural electromagnetic fields. The method has the advantage of being able to examine structure at all levels of the crust, allowing us to examine how the fault motion at the surface is linked to plate motion at depth. This project has international collaborators from Germany.