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What is an earthquake and what causes them to happen?

www2.usgs.gov/faq/categories/9827/3343

An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction. When the ...

Why Do Earthquakes Happen?

www.geo.mtu.edu/UPSeis/why.html

Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ...

What Causes an Earthquake? Faults Explained

news.nationalgeographic.com/news/2014/01/140115-earthquakes-california-faults-science/

Jan 15, 2014 ... What was that you felt? Faults deep underground produce different kinds of earthquakes.

www.ask.com/youtube?q=What Causes Earthquakes?&v=FIgksa3x11w
May 3, 2015 ... Check out our channel FunScienceDemos: https://www.youtube.com/user/ funsciencedemos Jared demonstrates how the earth's plates move, ...
www.ask.com/youtube?q=What Causes Earthquakes?&v=SB-FmX6_2lM
Mar 12, 2014 ... An earthquake is the shaking of the ground caused by an abrupt shift of rock along a fracture in the Earth, called a fault. Within s...

What causes Earthquakes? - Geoscience Australia

www.ga.gov.au/earthquakes/staticPageController.do?page=about-earthquakes/what-causes-an-earthquake

What causes Earthquakes. The Earth's outer layer or crust is broken into pieces called tectonic plates which are constantly moving towards, away from or past ...

What causes earthquakes? - Explain that Stuff

www.explainthatstuff.com/earthquakes.html

Sep 13, 2016 ... An easy-to-understand explanation of what causes earthquakes, how they move through Earth, and how we can protect buildings and people ...

What causes an earthquake? - The Telegraph

www.telegraph.co.uk/science/0/what-causes-an-earthquake/

Oct 20, 2016 ... What is a tsunami? How is a hurricane formed? Discover the science behind a range of natural phenomena and examine their cause and effect ...

What causes earthquakes?

www.empr.gov.bc.ca/Mining/Geoscience/SurficialGeology/Earthquakes/Pages/causes.aspx

The shaking motion of an earthquake is the result of a sudden release of energy. Earthquakes are caused when stress, building up within rocks of the earth's ...

What Causes Earthquakes? - Universe Today

www.universetoday.com/82050/how-earthquakes-happen/

Sep 16, 2016 ... The two main answers to 'how earthquakes happen' is: as a result of tectonic plates colliding and volcanic eruption. The shock waves ...

Answer
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.
More Info

The Science of Earthquakes - USGS Earthquake Hazards Program

earthquake.usgs.gov

Apr 7, 2016 ... An earthquake is what happens when two blocks of the earth suddenly slip past one ... What causes earthquakes and where do they happen?

The Causes of Earthquakes - SOEST - University of Hawaii

www.soest.hawaii.edu

Reply to ASK-AN-EARTH-SCIENTIST. Subject: What causes earthquakes? What causes earthquakes? The short answer is that earthquakes are caused by ...

What is an Earthquake? - Geoscience Australia

www.ga.gov.au

Earthquakes are the vibrations caused by rocks breaking under stress. The underground surface along which the rock breaks and moves is called a fault plane.