'''Earthquakes''' occur along all three types of [[Tectonic Plate Margin]] when tension builds up as the [[Tectonic Plate|plates]] move.
At [[Destructive Plate Margin]]s typically occur between a [[Continental plate|continental plate]] and [[Oceanic plate|oceanic plate]]. Upon collision, the denser [[Oceanic plate|oceanic plate]] is forced under the lighter [[Continental plate|continental plate]] in a process known as [[Subduction|subduction]]. There is a huge build-up of [[friction]] between the two plates move down past each other into as this happens, until the mantle [[frictionforce]] causes tension to build up and therefore becomes so great the plates get stuckno longer move. 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'''.
At [[Conservative Plate Margin]]s as the plates grind past each other [[friction]] causes tension to build between the plates as they move and this means that they eventually become stuck. As the plates are released and jerk away from each other they release shock waves that that spread from the [[Focus (Earthquake)|focus]] deep in the [[mantle]]. The shock waves are then felt on the surface of the [[crust]] in the form of an '''earthquake'''. The shock waves are most strongly felt at the [[Epicentre]] which is the point directly above the [[Focus (Earthquake)|focus]].