This is the third paper in a four‐part sequence that examines the nature of mantle layering
using the multiple‐ScS phases and internal reflections observed within the reverberative …

Laboratory experiments document that liquid iron reacts chemically with silicates at high
pressures (≥ 2.4× 1010 Pascals) and temperatures. In particular,(Mg, Fe) SiO3 perovskite …

Few seismic observations have revolutionized our con-cept of the deep Earth like the
discovery of a discontinuous increase in velocity a few hundred kilometers above the core …

Experiments with the laser‐heated diamond cell show that (Mg, Fe) SiO3 perovskite reacts
chemically with liquid iron at pressures greater than 70 GPa and temperatures above 3700 …

The 75 year history of the American Geophysical Union has accompanied great advances in
our understanding of the physics and chemistry of the transition zone between the Earth's …

S waves recorded by long‐period World‐Wide Standardized Seismograph Network and
broadband stations in North America for deep northwest Pacific subduction zone …

Seismic P and S waves recorded at the GRF array in Germany are used to study the
inhomogeneous structure of the boundary layer D ″at the base of the mantle. The use of the …

Abstract KNOWLEDGE of the spectrum of structure in the lower mantle is crucial to our
understanding of the dynamical evolution of the Earth and, in principle, can be inferred from …

Seismic waves are used to explore large‐scale radial structure and lateral heterogeneity of
shear velocity in the D ″region, the chemical and thermal boundary layer at the base of the …

The phase change model for the origin of the D ″seismic discontinuity is tested by
comparing the results of convection modeling with seismic observations. We compute a …