Flashcards in Restless Earth Deck (9)
What is liquifaction?
Where shaking in an earthquake causes water in soil layers to be brought to the surface and buildings to subside.
What is a fault line?
Where a section of crust splits or cracks during an earthquake.
What is tephra?
A mixture of ash and pumice (a light rock)
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.
How much stronger are supervolcanic eruptions?
What are the 4 stages to a supervolcanic eruption?
1. Magma basin fills.
2. Bulge on surface.
3. Eruption happens.
4. Caldera formed.
What can ash from a Supervolcano do and cause?
Block out sunlight causing mini ice ages
How is the power of a Supervolcano measured?
Volcanic Explosivity Index (VEI)