Mount St Helens

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Where is Mount St Helens?
Washington, NW USA
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When was the eruption?
18 May 1980 8.32am
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How fast did the landslide travel?
670 mph
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How many died?
57
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How many homes were destroyed?
200
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How many roads were destroyed?
300km
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What amenities were people left without?
clean water, electricity and sewage removal
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List 3 economic impacts?
15 square km timber destroyed, farm crops destroyed, 12 million salmon killed in hatcheries
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What was the overall cost of the eruption?
$1.1 million
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How long were commercial flights cancelled for?
2 weeks
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List 3 environmental impacts?
60,000 square km covered in ash, wildlife killed, water polluted by debris
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List 3 long term responses?
Roads and bridges repaired, people re-housed, forests re-planted
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List 3 short term responses?
Medical supplies for injured, helicopters rescued survivors, dust masks issued
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What plans have been made in case of future eruptions?
Emergency services trained, evacuation plan prepared, scientists monitor quakes, gases and temperatures
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How many people were rescued?
200
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Which way direction the lateral (sideways) blast go?
North
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What kind of plate boundary is there?
Subduction (destructive)
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What is the posh name for the mud flows?
Lahars
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What is the posh name for the hot ash cloud?
Pyroclastic flow
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What are the names of the two plates?
Juan de Fuca and North American
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Other cards in this set

Card 2

Front

When was the eruption?

Back

18 May 1980 8.32am

Card 3

Front

How fast did the landslide travel?

Back

Preview of the front of card 3

Card 4

Front

How many died?

Back

Preview of the front of card 4

Card 5

Front

How many homes were destroyed?

Back

Preview of the front of card 5
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