Global 3D configuration of seismic velocity heterogeneities in the mantle as imaged by seismic tomography

Global 3D configuration of seismic velocity heterogeneities in the mantle as imaged by seismic tomography

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Credit:
A. Dziewonski/IRIS Consortium

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Interpreted cross section from the Mantle Electromagnetic and Tomography (MELT ) experiment

Description

Global 3D configuration (extending from the mapped surface to the core-mantle boundary) of seismic velocity heterogeneities in the mantle as imaged by seismic tomography. Red regions have relatively low S-wave velocities, while blue regions have relatively fast S-wave velocities. The image is dominated by two enormous low-velocity regions, beneath Africa and the central Pacific plates, and by a ring of high velocities underlying subduction zones around the rim of the Pacific. (Image courtesy of A. Dziewonski).

Date Taken: February 18, 2009
Photographer / Contributor: A. Dziewonski

This photo has been tagged with

Seismological_Grand_Challenges, Long_Range_Science_Plan,

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