Volcanic eruption

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Name the location of a volcano you have studied
Mt St Helens, USA North-America
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When did this occur?
May 1980
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What plate margins did it happen on?
North American plate and pacific plate (DESTRUCTIVE)
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How many people were killed?
57
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Describe what happened
Peak dropped by 400m due to pressure build up. There were pyroclastic flows that flattened vegetation. Lahars (Mud flows). Ash blown off the top of the mountain.
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Secondary effects
sulphur dioxide released. vegetation destroyed. roads blocked. small eruptions
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Long term responses
1. Rebuild roads and bridges 2. clear drainage channels 3. attracts tourists 4. replant forest
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Short term responses
1. emergency medical treatment 2. Search and rescue 3. shelter found 4. roads cleared
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Card 2

Front

When did this occur?

Back

May 1980

Card 3

Front

What plate margins did it happen on?

Back

Preview of the front of card 3

Card 4

Front

How many people were killed?

Back

Preview of the front of card 4

Card 5

Front

Describe what happened

Back

Preview of the front of card 5
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