Volcano Flashcards
What is the name of a volcano that erupted
Mt. st. Helen
Where was the volcano
Washington, us
When did it erupt
18 may 1980
Why did it erupt
High supply of magma
Magma pathway blocked
Build up of pressure
Earthquake caused northern flank to collapse+ triggered eruption
What plates caused the earthquake
Subduction of Juan de Fuca under North American
What magnitude was the earthquake
4.2
What was released
Gas and steam
Debris swept into lake— death of wild animals»_space;> 250m tsunami
How many sq miles was the damage area
150
How many m did the volcano mountain explode
Top 300m
What was caused by the steam and ash
Pyroclastic cloud- 600oC,, 670mph
Went 150sqmiles
How many people died
57
What were the after effects
Tonnes of ash in atmosphere
Homes destroyed
Landscape destroyed
Animals and people killed
