CAREER: Career Development in Structural Seismology of Earth's Interior

CAREERGarnero0135119这项建议描述了地震学和地球物理学科学教育中研究地球深部及其相关活动的长期研究指导方针。亚利桑那州立大学地质科学系将开设地震学本科和研究生课程，该系最近经历了地球物理/地震学的扩张。地震学的许多主题超出了使用传统讲授方法的本科生课程的范围。新课程将使用更多使用计算机成像和动画的三维可视化，以及更具互动性的学习方法和类比。本科生和研究生课程都将利用已有的内部研究工具来研究最近和过去相关地震的地震数据。两节课都将强调个别学生和小组发现的重要性。拟议期间的研究活动侧重于对地球内部的地震研究，重点是深部地幔。三个主要的焦点领域是：(1)地震非均质性的确定，用于推断热和/或化学非均质性；(2)地震波速度各向异性的检测和表征，这与地幔中的流变学、动力学和流动有关；以及(3)边界层和/或地震性质的不连续性的检测和绘图，这可能与地球上的化学或相边界有关。拟议的工作利用了有关地震波的旅行时间和波形分析以及层析分析，并将利用该部两个最先进的计算机实验室，这两个实验室都配备了现代化的个人计算机和Unix计算机。以非均质性、各向异性和边界分层为特征的研究工作将包括2-D和3-D旅行时间以及波形分析和传播工具，这是地球深部地震学的重要下一步。

CAREERGarnero0135119This proposal describes a long-term research directive for studying Earth's deep interior and related activities in science education in seismology and geophysics. An undergraduate and graduate course in seismology will be developed in Arizona State University's Department of Geological Sciences, a department that has experienced recent expansion in geophysics/seismology. Many topics in seismology are beyond the scope of an undergraduate course that uses traditional lecturing approaches. The new courses will utilize more three dimensional visualizations using computer imaging and animation, along with more interactive learning methods and analogies. Both the undergraduate and graduate course will utilize already in-house research tools to study aspects of seismic data from recent and past relevant earthquakes. Emphasis on individual student and group discovery will be emphasized in both classes. Research activities for the proposed period focus on seismic studies of Earth's interior, with emphasis on the deep mantle. Three main areas of focus are: (1) determination of seismic heterogeneity, which is used to infer thermal and/or chemical heterogeneity; (2) detection and characterization of seismic wave speed anisotropy, which is related to rheology, dynamics, and flow in the mantle; and (3) detection and mapping of boundary layers and/or discontinuities in seismic properties, which may relate to chemical or phase boundaries in the Earth. The proposed work utilizes travel time and waveform analyses of relevant seismic waves and tomographic analyses, and will utilize two state of the art computer labs in the department, which are both outfitted with modern PC and UNIX computers. Research efforts characterizing heterogeneity, anisotropy, and boundary layering will include 2- and 3-D travel time and waveform analysis and propagation tools, an important next step in deep Earth seismology.--