Mt St Helens Facts

When did Mt St Helens erupt?

• 18th May 1970

• 18th March 1980

• 18th May 1980

• 18th March 1990

For how long had it been dormant?

• 23 years

• 123 years

• 73 years

• 1,230 years

Which agency were monitoring the volcano?

• USGS

• FEMA

• NHC

• FBI

Approximately how many people died?

• 57

• 77

• 38

• 120

In which state is Mt St Helens?

• Washington

• Wyoming

• Wisconsin

• West Virginia

How many bridges were damaged?

• 17

• 7

• 27

• 37

How many km of railways were damaged?

• 25

• 50

• 250

• 150

Which lake was blocked by the ash fall

• Spirit Lake

• Lake Pontchartrain

• Lake Eerie

• Great Slave

On which side of the mountain was the bulge that led to the collapse?

• North

• South

• East

• West

Which of these rivers was NOT effected by the eruption

• Colombia River

• Cowlitz

• Toutle

• Potomac