Earthquakes: animated guide

December 29, 2004, 4:02 am

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Find out what causes an earthquake

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Are they dangerous?

December 29, 2004, 4:16 am

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Earthquakes have killed hundreds of thousands of people even though scientists are able to make buildings much safer than in the past.

How often do they happen?

December 29, 2004, 4:32 am

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They happen all the time in various parts of the world.

Why do they happen?

December 29, 2004, 4:39 am

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Although the ground we walk on seems solid, things are constantly moving underneath the surface of our planet - the crust.

Tsunami: animated guide

December 31, 2004, 5:31 am

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Find out what causes a tsunami wave

Why is it dangerous after a quake?

May 28, 2008, 3:20 am

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Earthquakes are often followed by aftershocks.

Have there been serious ones recently?

January 21, 2010, 2:46 am

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In the last ten years there have been lots of big earthquakes.