Imaging Upper Mantle Fine Structure with Triplicated Multiple-S and WKM Synthetics

9973191墨尔本本项目建议采用新的体波模拟工具，对北美边缘附近的上地幔精细结构变化进行成像。 第二个目标是评估层析速度模型的准确性方面的合成他们生产。 模拟的相位将是来自沿着东太平洋隆起、阿拉斯加湾和阿留申群岛的事件的宽带、三重直S和多S波形。 对于这些震源，阵列提供了一个单一的震源记录部分与可识别的三重S及其多次波的相位时差。 这项工作的核心技术包括最近开发的射线算法适用于3D断层模型，这是来自WKBJ方法。 这种方法将被用来系统地研究上地幔和过渡带结构沿着北美西缘通过模拟三重S相位。

9973191MelbourneThis project proposes to employ new body waveform modeling tools to image fine scale upper mantle structural variations near the North American margin. A secondary goal is to assess the accuracy of tomographic velocity models in terms of the synthetics they produce. The phases modeled will be broadband, triplicated direct- and multiple-S waveforms from events along the East Pacific Rise, Gulf of Alaska, and Aleutians. For these sources, the array provides a single source record sections with identifiable phase moveout of triplicated S and its multiples. The centerpiece technology of this work includes a recently developed ray algorithm applicable to 3D tomographic models which is derived from the WKBJ method. This method will be used to systematically examine upper-mantle and transition-zone structure along the western margin of North America by modeling triplicated S phases.