Seismological models of upper-mantle structure are providing new constraints on the
physical and chemical properties that differentiate the lithosphere from the asthenosphere. A …

The lower boundary of the lithospheric plates has remained as an enigmatic boundary for
seismologists, since it is relatively poorly observed by seismic means. There is traditionally a …

Mantle seismic structure beneath the United States spanning from the active western plate
margin to the passive eastern margin was imaged with teleseismic P and S wave traveltime …

Plate tectonic theory was developed 50 years ago and underpins most of our understanding
of Earth's evolution. The theory explains observations of magnetic lineations on the seafloor …

The lithosphere-asthenosphere boundary divides the rigid lid from the weaker mantle and is
fundamental in plate tectonics. However, its depth and defining mechanism are not well …

Seismic S-wave receiver functions (SRF) are a uniquely powerful tool for imaging velocity
discontinuities within the upper mantle. SRF data frequently contain negative phases at …

We use common conversion point (CCP) stacking of Ps receiver functions to image the
crustal structure and Moho of the Garhwal Himalaya of India. Our seismic array of 21 …

Measurements of the splitting or birefringence of seismic shear waves that have passed
through the Earth's mantle yield constraints on the strength and geometry of elastic …

The deployment of USArray during the last decade has produced dense sampling of the
central part of the North American continent with broadband seismic data. Regional …

Sp and Ps converted seismic waves at 93 permanent seismic stations are used to image
upper mantle velocity discontinuities across the contiguous United States and portions of …