MEDC Volcano: Mt St Helens

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When did the earthquake occur?
18th May 1980
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What was the magnitude on the Richter scale?
5
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What made it happen in terms of tectonics?
Juan De Fuca Plate moved eastwards towards the North American plate (destructive pate margin)
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Which was prioritized first; Rescuing survivors or sending aid to towns?
Rescuing survivors
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When was the ash cleared?
3 days after the erruption
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When was it designated a National Park?
1982
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What happened to the forest a while after the erruption?
It was re-planted and the moonscape transformed
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How many extra masks were sent in aid?
2 million
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Where was the unstable bulge located?
North Face
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How many homes were destroyed?
250
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How many people died?
57
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What was the size of the crater created after the explosion?
1 mile by 500m
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Within **km of the volcano every plant and animal died
25km
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How much ash fell?
15cm
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How many salmon died (estimate)?
12 million
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What is a positive effect of the ash errupted?
Improve the quality of the soil
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How much was the damage?
$100 million
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Which industry was destroyed?
Timber
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Other cards in this set

Card 2

Front

What was the magnitude on the Richter scale?

Back

5

Card 3

Front

What made it happen in terms of tectonics?

Back

Preview of the front of card 3

Card 4

Front

Which was prioritized first; Rescuing survivors or sending aid to towns?

Back

Preview of the front of card 4

Card 5

Front

When was the ash cleared?

Back

Preview of the front of card 5
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