Apr

30

 More Phys.org stuff, but this is pretty interesting. They are reconsidering the elastic rebound model of earthquakes. They call it "Plastic" deformation:

"Their work has not only defined the size of the area's average rupture, but also has shown that widely used earthquake modeling may not account for when the crust sometimes deforms permanently, rather than snapping back to its original position."

and

"The Cornell researchers have concluded that up to 10 percent of the surface of South America that overlies the subduction zone, which is responsible for the great earthquakes and runs along the western coast of the continent through much of Chile, has actually deformed permanently due to earthquakes. If that's the case in other places too, elastic rebound theory-based earthquake modeling might be too simple, Allmendinger said."

Here is the abstract for the paper with accompanying figures.

And here is a good picture.


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