3 Case Studies For Geography (Hazards)

Question 1

What was the impact on the people when mount St Helen’s erupted

Answer 1

• 57 people died, 198 people had to be respected.
• ## small eruptions still occur

Question 2

What was the impact on the landscape when mount St Helen’s erupted

Answer 2

• The blast and pyro clastic flow killed every form of plant and animal life for a distance of 25km North of the volcano. Even fully grown fir trees were flattened, up to 30km away. About 7000 animals died.
• the mudflow chocked rivers with sediment, completely filling spirit lake.
• the eruption of ash blew away the top of the mountain. In seconds it changed from a mountain 2950 meter high to 2560 meters high. At the top a crater 500 meter deep formed.