GEOLOGY

Detailed explanation-1: -Deep earthquakes occur in subduction zones-where one of the tectonic plates floating on the surface of the Earth dives under another and is “subducted” into the mantle. Within the sinking slabs of crust, earthquakes cluster at some depths and are sparse in others.

Detailed explanation-2: -As old oceanic crust is subducted and melted into magma, new oceanic crust in the form of igneous rock is formed at mid-ocean ridges and volcanic hotspots.

Detailed explanation-3: -At subduction zones, the oceanic plate is pushed down, or subducted, below the continental lithosphere. As the oceanic slab descends, earthquakes are generated within the slab and at the interface between the plates.

Detailed explanation-4: -Earthquakes are usually caused when underground rock suddenly breaks and there is rapid motion along a fault. This sudden release of energy causes the seismic waves that make the ground shake.