Mt St Helens Volcano
A set of Questions and answers for the Mount St Helens volcanic eruption on May 18th 1980.
Terms in this set (28)
18th May 1980
What date did it happen?
What type of volcano is it?
What plate boundary type is it?
Juan de Fuca (oceanic) North American (continental)
Which to plates are involved?
What was the magnitude of the earthquake which triggered the eruption?
How many animals died?
How many salmon died?
How many homes were destroyed?
How many people died?
How many bridges were destroyed?
How many miles of railway was destroyed?
How many miles of highway was destroyed?
How much was the damage to crops and machinery?
On March 20th what happened?
There was a loud bang and puff of smoke on what day?
There was a growing bulge on the north flank?
How many people were rescued from mudflows?
half a mile (mile from top to bottom)
How wide was the bulge and surrounding areas of the volcano which slid down after the earthquake on May 18th?
For more than 9hours the plume of ash erupted
hot ash melted ice caused...
What percentage of the people killed were in "safe" areas?
How many cm of ash fell causing chaos to traffic?
How many tonnes of ash was removed from roads, airports and buildings?
How much did it cost to replant trees?
How much was the compensation to farmers?
What state is mount st helens in?
cascade mountain range
What mountain range is mount st helens in?
How tall was mt st helens before the eruption?