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→About Earthquakes
===About Earthquakes===
'''Earthquakes''' occur along all three types of [[Tectonic Plate Margin]] when tension builds up as the [[Tectonic PlatesPlate|plates]] move.
At [[Destructive Plate Margin]]s as the two plates move down past each other into the mantle [[friction]] causes tension to build up and therefore the plates get stuck. As the plates are released and jerk away from each other they release shock waves that that spread from the [[Focus|focus]] deep in the [[mantle]] where the plates are coming together. The shock waves are then felt on the surface of the [[crust]] and they are most strongly felt at the [[Epicentre]] which is the point directly above the [[focus]]. This is an '''earthquake'''.