-Earthquake = a sudden movement of the earth's crust caused by the release of stress built up along faults.
-Fault = an area of weakness in the earth's crust.
-Earthquakes occur mainly on plate boundaries that are moving towards or past each other (Convergent or Transform).
-As the plates move, friction locks them together.
-Over many years, pressure builds up until eventually the rocks snap along a weak area called a fault line.
-The stored energy is released and it travels outwards as seismic waves.
-These seismic waves or shock waves, cause the earth's crust to shake up and down, and side to side, causing an earthquake.
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