What Causes a Earthquake?

Answer

An earthquake is described as a sudden movement or tremor of the crust of the earth which originates from under or on top of the surface. The two major causes of earthquakes are explosive volcanic eruptions and tectonic activities related to plate faults and margins.
Q&A Related to "What Causes a Earthquake"
The Caribbean Sea is an active tectonic zone, where the smaller Caribbean Plate is sandwiched between the larger North American and South American plates. The northern edge of the
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In a very general sense all earthquakes have the same cause. They are caused by the release of stress in the earth's crust. the higher the stress the more potential for movement.
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tectonic plates moving causeing plates to fold and fault causes volcanic eruption and earthquakes.
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2 Additional Answers
Ask.com Answer for: what causes a earthquake
Earthquakes are caused by an abrupt shift of rock along a fracture in the Earth.
Most earthquakes are caused by slow movements inside the Earth that push against the Earth's brittle, relatively thin outer layer, causing the rocks to break suddenly.
The movement of two of the Earth's plates, or layers, is what causes an earthquake. The two plates move and either run into each other or slide past each other. You can find more information here: http://earthquake.usgs.gov/learn/kids/eqscience.php
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