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TRUE/FALSE. At depths below 100 km, subduction zone earthquakes occur almost exclusively in the interior of the colder oceanic lithosphere, the heart of the subducting slab.

Sagot :

TRUE. The crust or upper mantle, which extends from the surface of the earth to a depth of about 800 kilometers, is where earthquakes occur.

The strength of shaking at the surface from an earthquake that occurs at 500 km depth is significantly less than if the same earthquake had occurred at 20 km depth because the strength of shaking from an earthquake weakens with increasing distance from the earthquake's source.Additionally, the depths of earthquakes reveal vital details about the tectonic environment and the structure of the Earth. In subduction zones, where plates are colliding and one plate is being subducted beneath another, this is most obvious. We can see details of a subduction zone's structure, such as how steeply it dips and whether the down-going plate is planar or bent, by carefully plotting the location and depth of earthquakes connected to the zone.

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