title: Body-wave imaging of Earth's mantle discontinuities from ambient seismic noise.
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.
authors.affiliation: Institut des Sciences de la Terre, Université de Grenoble I, CNRS, BP 53, F-38041 Grenoble Cedex 9, France. polip@ujf-grenoble.fr
authors.forename: P
authors.initials: P
authors.lastname: Poli
authors.forename: M
authors.initials: M
authors.lastname: Campillo
authors.forename: H
authors.initials: H
authors.lastname: Pedersen