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Earthquakes
Earthquakes - an animated guide
Use this animated guide to find out what causes earthquakes and where they occur.
http://news.bbc.co.uk/1/hi/sci/tech/4126809.stm
Tsunami explained - an animated guide
Tsunami can have a devastating impact on coastal areas. This animated guide explains how they happen.
http://news.bbc.co.uk[5194316].stm