Measuring Long-Period Travel Times

由于先前的NSF支持，该研究项目已 开发了一套超过10，000个PP-P和SS-S的测量方法， 长周期差旅行时间。处理此数据集， 日期包括对影响 数据和测量相关性的检查 三维模型和地质构造 基于这些软件和数据 集中力量，在不同地震阶段进行新的实验 并进行地幔结构的三维反演。 这项工作 是对以前NSF支持的 research. 该研究对三维空间的 确定地幔地震速度， 对流动力学模型中的约束， 地壳变形和地震 因此，它是一个 为国家地震减灾计划捐款。

As a result of previous NSF support, this research project has developed a set of over 10,000 measurements of PP-P and SS-S long-period differential travel times . Work on this data set to date includes a description of the various factors affecting the data and an examination of the correlation of the measurements with 3-D models and tectonics. Based on these software and data gathering efforts, new experiments on different seismic phases and 3-D inversions for mantle structure will be done. This work is an obvious and needed extension of previous NSF-supported research. This research has important application to the 3-D determination of mantle seismic velocities which are used as constraints in dynamic models of convection, the driving force of crustal distortion and earthquakes. It therefore is a contribution to the National Earthquake Hazard Reduction Program.