Unit 4 - Case Studies (Mount St. Helens) Flashcards
Where is Mount St. Helens located?
Washington, USA
Where is Washington located?
Sits on a zone of earthquakes and volcanoes and their is national forest around the mountain
How many hours of surveillance was the volcano under due to it being hard to predict?
24 hours
When did it erupt?
18th May at 8.32 am (1980)
What degree of ash exploded from the mountain?
350 degrees
How many people died?
57 deaths
How many dollars in damage did the volcano cause?
1.1 billion dollars in property damage
What VEI was the volcano?
VEI 5 - declared the most disastrous volcanic eruption in USAs history
How many months worth of earthquakes were there beforehand?
2 months
Which face/side of the volcano weakened to then slide away creating the largest landslide ever recorded?
The North Face
What was the name of the innkeeper that refused to evacuate from his house near the mountain?
Harry R. Truman
What was the name of the photographer and geologist who also died amongst the 57 deaths?
Reid Blackburn and David A. Johnston - both thought to have died during the eruption
How many square miles of land were reduced to wasteland?
Hundreds of square miles
What was the cost of damage caused?
One billion U.S dollars
What nature was also destroyed by the volcano?
Animals and their habitats - River banks also burst
