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.
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
Q&A Related to "What Causes a Earthquake"
All earthquakes have a common cause which is the sudden movement of tectonic plates in the crust of the Earth. In 1995, 50 km of fault moved with shock waves not having to travel
http://answers.ask.com/Society/History/what_caused...
Tectonic plates are the moving pieces of Earth's crust and outer mantle, which cover the entire planet. These plates are in constant, slow motion, and sometimes bump and slide past
http://www.ehow.com/info_8737831_causes-tsunamis-e...
When big slabs of rock underground called, tectonic plates, move this causes molten rock to rise to the surface. Earthquakes are made by the plates scraping against each other.
http://wiki.answers.com/Q/What_causes_volcanoes_an...
the three main causes of earthquake are:
http://wiki.answers.com/Q/What_are_the_three_main_...
Explore this Topic
Earthquakes are mainly caused by the tension or pressure that is released from the rocks in the Earth's crust and upper mantle. This tension could be due to friction ...
Earthquakes are caused by the movement or shifting of tectonic plates along a fault line. The San Andreas Fault in California is the most well-known fault in ...
When the Earth's crust has a sudden release of energy it creates what are known as seismic waves. These waves are what cause earthquakes to happen. Not only are ...
About -  Privacy -  AskEraser  -  Careers -  Ask Blog -  Mobile -  Help -  Feedback © 2014 Ask.com