Catherine A. Rychert and Peter M. Shearer used fifteen years of global seismic wave observations to image a sharp interface near the lithosphere-asthenosphere boundary. Conversions from P waves to S waves constrain the interface's depth and sharpness: a transition that preserves high-frequency converted phases is too sharp to be explained by a broad thermal gradient alone. Their interpretation therefore considers composition, melting and seismic anisotropy, and distinguishes the interface beneath oceans from a possible internal boundary inside thicker cratons.[ref]
A seismology researcher studying lithosphere and asthenosphere structure. Institutional profile: mit.whoi.edu/faculty/5644/
Figure 1.
Catherine A. Rychert, portrait linked from the MIT-WHOI Joint Program institutional profile
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