Things to consider when interpreting Sp receiver functions…

Things to consider when interpreting Sp receiver functions…

Conversions of shear waves (S) to compressional waves (P), often analyzed as Sp receiver functions, are useful for studying upper mantle layering, and have been...

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About those amplitudes…

About those amplitudes…

It is well known, at least among tomographers, that our images of the Earth's interior are washed out. Lateral variations in seismic velocities are likely...

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Improvement in P-wave tomography due to EarthScope

Improvement in P-wave tomography due to EarthScope

The EarthScope project has been described as the Apollo program of the solid Earth community. It has enabled an unprecedented investment in seismic instrumentation, and...

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Reference Model of LLSVP Morphology

Reference Model of LLSVP Morphology

Using depth-dependent clustering analysis of global Vs and Vp tomographic models, we have constructed a new reference model for LLSVP shape and volume. We obtain...

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3D Reference Earth Model

3D Reference Earth Model

REM-3D is a project funded by the National Science Foundation and carried out by Raj Moulik, Ved Lekic, Barbara Romanowicz, and Adam Dziewonski. If you have...

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Viscosity increase in the Earth’s mid mantle

Viscosity increase in the Earth’s mid mantle

Together with collaborators Max Rudolph at Portland State University and Carolina Lithgow-Bertelloni at University College London, we used a novel inversion framework to detect the...

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Lithospheric Structure of the Western United States

Lithospheric Structure of the Western United States

Using data from the EarthScope Transportable Array, we observed and modeled conversions of S waves to P waves across velocity contrasts within the lithosphere across...

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Lithospheric thinning beneath rifted regions of Southern California

Lithospheric thinning beneath rifted regions of Southern California

Conversions of teleseismic shear (S) waves to compressional (P) waves across velocity interfaces (such as the Moho or the lithosphere-asthenosphere boundary) allow us to map...

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Cluster analysis of upper mantle tomography

Cluster analysis of upper mantle tomography

When cluster analysis is used to classify the profiles of shear velocity (Vs) into N groups whose members are similar, the geographic extents of these...

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Full waveform tomography with the spectral element method

Full waveform tomography with the spectral element method

Map of lateral variations in the velocity of seismic shear waves (S-waves) at a depth of 125 km. Warm colors denote slower wavespeeds, and are...

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