Although an average westward rotation of the Earth's lithosphere is indicated by global
analyses of surface features tied to the deep mantle (eg, hot spot tracks), the rate of …

We compare a global compilation of shear-wave splitting measurements with azimuthal
seismic anisotropy parameters inferred from surface-wave tomography. The currently …

Viscous shear in the asthenosphere accommodates relative motion between Earth's surface
plates and underlying mantle, generating lattice‐preferred orientation (LPO) in olivine …

Based on observations in both the laboratory and the Earth, we develop the hypothesis that
plate boundaries are lubricated by networks of melt‐rich shear zones. Such lubrication …

Mid-plate upward mantle flow is a key component of global mantle convection, but its
patterns are poorly constrained. Seismic anisotropy is the most direct way to infer mantle …

Volcanic hotspots are regions of intraplate volcanism or excess volcanism at plate margins
that are not adequately explained by the plate tectonic paradigm. Hotspots have been …

Upper-mantle flow beneath the South Pacific is investigated by analysing shear wave
splitting parameters at eight permanent long-period and broad-band seismic stations and 10 …

We present a Rayleigh wave tomographic study of the upper mantle beneath the Galápagos
Archipelago. We analyze waves in 12 separate frequency bands (8–50 mHz) sensitive to …

Crustal anisotropy beneath ocean islands can be attributed to preferentially aligned
minerals, cracks, or dike structures. Stacked with harmonic weighting, receiver functions …

Abstract The Nazca, Caribbean, and South America plates meet in northwestern South
America where the northern end of the Andean volcanic arc and Wadati‐Benioff zone …