Tsunamis

Question 1

What is a tsunami?

Answer 1

Displacement of a large amount of water from its equilibrium state
As a result of mass movement, an earthquake or a volcanic eruption

Question 2

Where do they occur?

Answer 2

At plate margins

Ground deformation at dip-slip faults at subduction zones

Question 3

How are tsunamis generated?

Answer 3

123

Question 4

What are tsunami-earthquakes?

Answer 4

large tsunamis formed from small earthquakes as a result of low-frequency seismic energy, hard to detect (Sugioka et al, 2012)

Question 5

Describe a tsunami in terms of its features

Answer 5

Crest is to top of the wave
Wavelength is the distance between crests
Wave height is the vertical distance from crest to trough
Run-up height is the maximum height the wave reaches inland

Question 6

What us the difference between Distant and Local Tsunamis?

Answer 6

123

Question 7

Outline the Tsunami case study

Answer 7

123

Question 8

How are tsunamis minimised?

Answer 8

Detection and Warning systems 
Structural Controls
Tsunami run-up maps
Land use planning 
Education 
Self protection