Imaging Earth Structure by Stacking Global Seismograms

这项研究通过叠加来研究地震相位， 全球地震网络的长周期地震图。 到目前为止，使用这种技术的工作已经成功地成像了几十个 包括许多来自上地幔的反射波 不连续性，其中一些以前没有观察到。 这项工作将得到加强，目标是绘制 上地幔不连续地形，一个重要线索， 地幔对流模型的性质正在经历激烈的 讨论 将密切注意可能的反射物 在核幔边界以上的D”区， 这对地幔柱对流的模型很重要。

This research investigates seismic phases by stacking, or summing, long-period seismograms from the Global Seismic Network. Work to date using this technique has successfully imaged dozens of seismic phases, including many reflections from upper mantle discontinuities, some of which had not previously been observed. This work will be intensified with a goal of producing maps of upper mantle discontinuity topography, an important clue to the nature of mantle convection models now undergoing intense discussion. Close attention will be given to possible reflectors in the D" region above the core-mantle boundary, an area important to models of plume convection in the mantle.