The unique anisotropy of the Pacific upper mantle.

Authors :: Ekstrom, Goran
Dziewonski, Adam M.
Source :: Nature. 7/9/1998, Vol. 394 Issue 6689, p168. 5p. 2 Color Photographs, 1 Chart, 4 Graphs, 9 Maps.
Publication Year :: 1998
Abstract: Reports on the unique anisotropy of the Pacific upper mantle. The assumption that either the effect of anisotropy on seismic velocities is small in comparison with isotropic thermal or compositional effects, or that the tomographic results represent the average isotropic heterogeneity; Results from a global three-dimensional tomographic model.