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Flashcards in Tsunamis Deck (5)
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What causes tsunamis?

earthquake beneath the sea floor :
- plates grind together and move the bed up and down
- hundreds of cubic metres of water can be displaced
- water slows down in shallower water and piles up = wave


How frequently do large ones occur?

rare: about 25 in the past century


Where has the highest amount of tsunamis?

60% of all known tsunamis are in American Samoa and Tonga and Samoa


Can earthquakes be predicted?



Can tsunamis be predicted?

Earthquakes can't be predicted however, geologists can determine within minutes after an earthquake whether a tsunami is likely.
People need to recognise signs of earthquakes and reach high ground