Mount St. Helens Eruption Facts

The video discusses Washington's resilience and the catastrophic eruption of Mount St. Helens on May 18, 1980. It highlights the destruction caused, including the loss of lives and infrastructure. Volcanologist David Johnston's observations and the subsequent impact on the region are detailed, emphasizing the eruption's significance as a major natural disaster in U.S. history.

What significant event challenged Washington's resilience on May 18, 1980?

• A major earthquake

• A volcanic eruption

• A severe storm

• A large flood

What evidence remains of the eruption's power at Spirit Lake?

• A dried-up lake

• Thousands of uprooted trees

• A new mountain formed

• A large crater

Who was the volcanologist monitoring Mount St. Helens during the eruption?

• Robert Brown

• David Johnston

• Michael Clark

• John Smith

What natural event triggered the eruption of Mount St. Helens?

• A lightning strike

• A volcanic tremor

• A landslide

• A 5.1 magnitude earthquake

How fast did the superheated cloud of gas and debris travel during the eruption?

• At subsonic speed

• At the speed of light

• At supersonic speed

• At the speed of sound

What was the extent of the area devastated by the eruption?

• 500 square miles

• 750 square miles

• 250 square miles

• 100 square miles

How many homes were destroyed by the eruption of Mount St. Helens?

• 250 homes

• 200 homes

• 100 homes

• 150 homes

How many bridges were destroyed during the eruption?

• 60 bridges

• 75 bridges

• 47 bridges

• 30 bridges

How many miles of highway were destroyed by the eruption?

• 185 miles

• 150 miles

• 100 miles

• 200 miles

How many lives were lost due to the eruption of Mount St. Helens?

• 30 lives

• 45 lives

• 57 lives

• 70 lives