Seismic Perturbation Methods with Application to Inversion

本研究旨在建立三维地球结构地震记录反演的理论摄动方法。改进理论方法的真实性是一个有望在地球结构方面产生重大新成果的领域。一个重要的应用将是显著改进的新数据集，如nsf支持的PASSCAL仪器将产生的数据集。微扰法将应用于地震反演的泛函导数计算。最终目标是同时反演速度、衰减和界面参数的走时和振幅。这项工作将为广泛的地震调查提供基本的理论分析技术，包括预测与地震有关的地壳结构的确定，是对国家减少地震危害计划基础研究的贡献。

This research is to develop theoretical perturbation methods towards inversion of seismograms for 3-D earth structure. Improved realism in theoretical methods is a field which promises to yield major new results on earth structure. An important application will be to the dramatically improved new data sets such as those which the NSF-supported PASSCAL instrumentation will produce. Perturbation methods will be applied to the calculation of functional derivatives for seismic inversion. The ultimate goal is the simultaneous inversion of both travel-time and amplitude for velocity, attenuation and interface parameters. Because this work will provide basic theoretical analysis techniques for a wide range of seismic investigations including those anticipated for determination of earthquake-related crustal structures, it is a contribution to the basic research of the National Earthquake Hazard Reduction Program.