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Acoustic imaging reveals hidden features of megathrust fault off Costa Rica

Geophysicists have obtained detailed three-dimensional images of a dangerous megathrust fault west of Costa Rica where two plates of the Earth’s crust collide. The images reveal features of the fault surface, including long grooves or corrugations, that may determine how the fault will slip in an earthquake.

Perspective view of the shallow megathrust looking seaward towards the trench; the frontal prism has been cut away.
The color…

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via The Archaeology News Network,


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