Volcano Examples

Question 1

Explain Tseax Cone, BC volcano

Answer 1

volcanic eruption 1700CE
- destroyed 3 villages
- altered labdscape

Question 2

What is an Adaawak?

Answer 2

fast moving lava flow at beginning of an eruption

Question 3

Explain what happened at Mt St. Helens

Answer 3

• M5.1 earthquake struck beneath mountain at shallow depth
• Triggered debris avalanche
  depressurization
• Resulted in eruption

Question 4

explain the hazards of Mt St. Helens

Answer 4

• Crater walls
• Lava dome
• Debris avalanche
• Mudflow
• Pyroclastic flow
• Transportation infrastructure destroyed

Question 5

Explain the Lahar at Mt St. Helens

Answer 5

• Snow, Ice and glaciers melted, forming series of large lahars
• Reduced channel depth in Columbia River from 12m to 4m

Question 6

Explain the Hazards of Mt. Rainier

Answer 6

• Past history of Lahars
• Near large population centres
• Ready source of water
• Mapping, flow modelling and land use planning
• Monitiring and warning to evacuate