Three Dimensional Structure of the Mantle

本研究的目的是提高对三维空间的认识， 地球的地幔结构。 P-和S-的改进 波速模型将通过扩展 以下观察结果：波形数据的增加 使用许多新的宽带数字电台数据的基地 1984年以后部署，扩大绝对和差别 从数字地震图测量的走时数据集，以及 由ISC开发新的“旅行时间汇总”数据库 包含地震台-震源区异常的公告。 在获得这一数据库后，将联合 波形和走时的反演;过去这些数据 被分别对待。 除了这一主要目标外， 所获得的数据将允许进行大规模的检查 各向异性和Q的横向变化。

This research is to advance the knowledge of three dimensional structure of the Earth's mantle. The improvement of P- and S- wave velocity models will be accomplished through expansion of the following observations: augmentation of the waveform data bases using data from many new broad-band digital stations deployed after 1984, expansion of absolute and differential travel-time data sets measured from digital seismograms, and development of a new "summary travel time" data base from ISC Bulletins containing seismic station-source region anomalies. Acquisition of this data base will be followed by a joint inversion of waveforms and traveltimes; in the past these data were treated separately. In addition to this primary objective, the acquired data will allow the examination for large scale anisotropy and lateral variations in Q.