Changes

[[Destructive Plate Margin]]s typically occur between a [[Continental platePlate|continental plate]] and [[Oceanic platePlate|oceanic plate]]. Upon collision, the denser [[Oceanic platePlate|oceanic plate]] is forced under the lighter [[Continental platePlate|continental plate]] in a process known as [[Subduction|subduction]]. There is a huge build-up of [[friction]] between the two plates as this happens, until the [[force]] becomes so great the plates no 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 causing a build-up of [[friction]] causes . As tension to build between builds 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]].