Visual Encyclopedia

Earthquake

An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth, resulting from the sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in size from those that are so weak that they cannot be felt to those violent enough to toss people around and destroy whole cities. The seismicity or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time.

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Amateur video from an American tourist visiting a park when the earthquake struck shows how dynamic the ground can be. This is the result of liquefaction when soil saturated with water experiences stress which increases the pressure of water and causes the soil particles to behave like a liquid, hence the name liquefaction. Extra info here: www.iflscience.com

Contributed by Sam Feldstone

A church devastated from an earthquake in Chile

Contributed by Thomas James Pierce

Christchurch New Zealand in ruins after an earthquake :(

Contributed by Thomas James Pierce

Cracked ground in Christchurch New Zealand

Contributed by Thomas James Pierce

I was so happy to see my friend come back from Japan after this!

Contributed by Thomas James Pierce

Description of.

Contributed by Analleli G Moreno

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