Mount St Helens Volcanic Eruption Flashcards
1
Q
When did the first earthquake occur?
A
20th March 1980
2
Q
When did the volcano finally erupt?
A
18th May 1980
3
Q
Where did the eruption take place?
A
Washington state, USA.
4
Q
In which mountain range is Mount At Helens?
A
The cascade mountains
5
Q
How many people died?
A
57
6
Q
How many homes were destroyed?
A
250
7
Q
How much farming damage was done?
A
$100 million
8
Q
How many states were covered in ash?
A
11
9
Q
How much did the overall damage cost?
A
$1.1 billion
10
Q
Down which rivers did lahars flow?
A
Toutle and Cowlitz rivers
11
Q
What caused the eruption?
A
Earthquakes caused by magma movement and friction from the Juan de fuca plate sub ducting under the North American plate.
12
Q
What was created as a result of the ash?
A
Fertile land
13
Q
What was the magnitude of the earthquake that caused the eruption?
A
5
