Презентація "Volcanic Eruptions"

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Volcanic Eruptions
Kate Krepark


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Plan:-What is a volcano?-What is an eruption?-How many active volcanoes are there in the world?-10 of the most catastrophic volcanic eruptions- The most disastrous volcanic eruptions


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What is a volcano?


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What is an eruption?


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How many active volcanoes are there in the world?


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Erupting now:  perhaps 20 Each year:  50-70 Each decade:  about 160 Historical eruptions:  about 550 Known Holocene eruptions (last 10,000 years):  about 1300 Known (and possible) Holocene eruptions:  about 1500 Note that these figures do not include the large number of eruptions (and undescribed volcanoes) on the deep sea floor. Estimates of global magma budgets suggest that roughly 3/4 of the lava reaching Earth's surface does so unnoticed at submarinemidocean ridges (see below). 


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10 of the most catastrophic volcanic eruptions


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The most disastrous volcanic eruptions Table lists the most catastrophic eruption of the volcano in the world, indicating: the name of the volcano, the year of the eruption, the number of deaths. The table shows the disaster eruptions number of victims more than 500 people.


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the number of deaths


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Thanks for your attention