Seismic velocity discontinuities beneath the Sierra Nevada

Seismic velocity discontinuities beneath the Sierra Nevada

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Credit:
H. Gilbert, C. Jones, T. Owens, and G. Zandt, 2007

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Tomographic image of the ratio between P velocity and S velocity in a subduction zone beneath Nicaragua

Description

Seismic velocity discontinuities beneath the Sierra Nevada, imaged by EarthScope instruments, reveal regions of detaching lower crust beneath the mountain range, demonstrating the complexity of continental lithosphere evolution. (Image updated from original published in H. Gilbert, C. Jones, T. Owens, and G. Zandt, 2007. Imaging Sierra Nevada lithospheric sinking, Eos Transactions, American Geophysical Union, 88(21):225, 229.)

Date Taken: February 18, 2009
Photographer / Contributor: H. Gilbert, C. Jones, T. Owens, and G. Zandt, 2007

This photo has been tagged with

Seismological_Grand_Challenges, Long_Range_Science_Plan,

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