Investigation of localized 3-D elastic and anelastic structures by body-wave waveform inversion

我们已经开发了三维地球结构地震波形数据的反演方法。我们将我们的方法初步应用于密集排列的地震仪网络记录的数据集，获得了中美洲和西太平洋最低地幔的三维剪切速度结构。所得到的中美洲模式表明，存在一个与俯冲冷板相关的高速区。所得到的西太平洋模式表明存在热柱。

We have developed methods for inverting seismic waveform data for 3-D Earth structure. We made preliminary applications of our methods to datasets recorded by dense array network of seismometers and obtained3-D shear velocity structures in the lowermost mantle beneath Central America and the western Pacific. The obtained model for Central America suggests that there is a high velocity zone which associates with a subducted cold slab. The obtained model for thewestern Pacific suggests the existence of thermal plumes.