Explosive eruptions Flashcards Preview

A2 Geography Hazardous Earth > Explosive eruptions > Flashcards

Flashcards in Explosive eruptions Deck (12):
1

Where are explosive eruptions located at

Convergent plate boundaries

2

What type of lava does explosive eruptions have

Rhyolite and andesite

3

What are the lava characteristics of explosive erruptions

Acidic, high viscosity and lower temperature at eruption

4

What is the eruption style of explosive eruptions

Violent bursting of gas bubbles, explosive, vent often shatters

5

What materials are erupted in an explosive eruption

Gas, Dust, Ash, Lava bombs, Tephra

6

How frequent are eruptions of explosive eruptions

Long periods with no activity

7

What ship volcano has an explosive eruption

Strato volcano

8

Why is the eruption explosive

The acid magma does not flow so easily so it plugs the events and pressure builds up until an explosion

9

What is a caldera

Volcanic craters, occurs when an explosive eruption magma lessens so there is less holding the above rock put so the above rock falls

10

What is magnitude

Amount of material erupted

11

What is intensity

The speed at which the material is erupted

12

What is the VEI

Combines magnitude and intensity into a single scale 1-8
volume erupted and height it reaches but not useful for effusive volcanoes