Determination of the Upper Mantle Structure Beneath Southern California Using Long-Period Love and Rayleigh Waves Recorded at TERRAscope Stations

这项研究是利用长周期表面波记录在 TERRAscope（最近安装的甚宽频带地震网络 在南加州由加州理工学院） 来确定南加州的相速度。 井 建立的方法将适用于这些现代高质量的 数据 以前测量的周期范围有限 27秒，因为数据质量有限。 新数据 设置将周期范围扩展到150秒。 增加的 这一时期对于探索深部结构至关重要， 是200公里的深度。 更好地了解这些深层次的 上地幔的结构将有助于理解 控制着地震活动和构造变形 目前发生在南加州。 本研究是 国家地震减灾计划的一部分。

This research is to use long-period surface waves recorded at the TERRAscope (the very-broadband seismic network recently installed in southern California by the California Institute of Technology) to determine phase velocities in southern California. A well established method will be applied to these modern high-quality data. The period range of the previous measurements was limited to 27 seconds because of the limited quality of data. The new data set will extend the period range to 150 seconds. The increased period is critically important for exploring deep structures, that is, to a depth of 200 km. A better knowledge of these deep structures in the upper mantle will help understand the dynamics that controls the seismic activity and tectonic deformation presently taking place in southern California. This research is a component of the National Earthquake Hazard Reduction Program.