Mt St Helens Flashcards by james Kimberley | Brainscape

Q

When?

A

May 18 1980 08:32

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Q

Where?

A

Cascade mountains. Washington. NW USA

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Q

Lake? Volcano?

A

Spirit lake. Composite volcano.

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Q

Last eruption?

A

1857

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Q

Earthquakes?

A

10,000 pre eruption

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Q

Kryptodome, inflate …. A day?

A

6 feet, north side

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Q

Flow?

A

Pyroclastic

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Q

…. Miles destroyed?

A

370

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Q

…. People killed

A

57

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Q

…. Times more powerful than Hiroshima bomb

A

27

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Q

Everything in …. Radius dead

A

17

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Q

Magma … Celsius

A

900

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Q

…. Mph…. Minutes long

A

700, 4.

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Q

Plates?

A

Juan De Fuca. N American

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Q

… Mile exclusion zone

A

20

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