MEDC Tetonic Hazard- Mt.St Helens Flashcards
0
Q
Where was the eruption
Helens
A
The cascade mountains in North west America
1
Q
When was the eruption
Helens
A
1980
2
Q
How tall is the mountain
A
3km
3
Q
When was the last eruption
A
123 years ago
4
Q
What type of volcano is it
A
Composite
5
Q
What plates were involved
Haiti
A
Just de fuca subducts under the n. American
6
Q
What earthquake caused the landslide
A
5.1 on the Richter scale
7
Q
Why did the lava get pushed North
A
The volcano had a cap made from pervious lava
8
Q
What was the big bulge called on the side of the volcano
A
Kyrptodome
9
Q
What was the speed of the blast and what was it called
A
Lateral blast at 700mph
10
Q
What was the lateral depression equivalent to
A
1 hydrogen bomb every secound
11
Q
How big was the kyrptodome
A
1 mile2
12
Q
How many people died
Helens
A
57
13
Q
What was the name of the lake that got filled
A
Spirit lake
