Introduction to Tsunamis

Question 1

Definition of Tsunami.

Answer 1

Series of giant sea waves generated by a shallow underwater focus earthquake, volcanic eruptions, underwater debris slides and large landslides into the sea.

Question 2

Characteristics of Tsunami.

Answer 2

Very long wavelength - sometimes over 100km.
Low wave height in the open sea - under 1m.
Travel quickly - 700km per hour.

Question 3

When a Tsunami reaches the land what does it effect depend on?
6

Answer 3

Height of waves - distance travelled.
Length of event from source.
Warning given.
Coasts physical geography - offshore.
Coastal land use.
Population density.