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Body-Wave Imaging of Earth’s Mantle Discontinuities from Ambient Seismic Noise

Science  23 Nov 2012:
Vol. 338, Issue 6110, pp. 1063-1065
DOI: 10.1126/science.1228194

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Abstract

Ambient seismic noise correlations are widely used for high-resolution surface-wave imaging of Earth’s lithosphere. Similar observations of the seismic body waves that propagate through the interior of Earth would provide a window into the deep Earth. We report the observation of the mantle transition zone through noise correlations of P waves as they are reflected by the discontinuities associated with the top [410 kliometers (km)] and the bottom (660 km) of this zone. Our data demonstrate that high-resolution mapping of the mantle transition zone is possible without using earthquake sources.

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