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Flashcards in Restless Earth Deck (9)
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1
Restless Earth

What is liquifaction?

Where shaking in an earthquake causes water in soil layers to be brought to the surface and buildings to subside.

2
Restless Earth

What is a fault line?

Where a section of crust splits or cracks during an earthquake.

3
Restless Earth

What is tephra?

A mixture of ash and pumice (a light rock)

4
Restless Earth

What is a tsunami?

Tsunamis are formed by movement of earth's crust under ocean. Movement is often due to an earthquake.
As crust jolts it causes water to displace.

Displaced water creates a wave that travels in all directions and causes devastation when reaching land.

5

How much stronger are supervolcanic eruptions?

10,000

6

What are the 4 stages to a supervolcanic eruption?

1. Magma basin fills.

2. Bulge on surface.

3. Eruption happens.

4. Caldera formed.

7

What can ash from a Supervolcano do and cause?

Block out sunlight causing mini ice ages

8

How is the power of a Supervolcano measured?

Volcanic Explosivity Index (VEI)

9

What scale does Volcanic Explosivity Index (VEI) follow?

1-8 and is logarithmic