Tsunamis Flashcards
1
Q
what are tsunamis?
A
giant sea waves generated by shallow focus underwater earthquakes involving movements of the sea bed
2
Q
what do tsunamis have?
A
a very long wavelength and a low wave height they are in the open ocean and travel at speeds of 700km per hour
3
Q
how are tsunamis formed?
A
- rapid movement of ocean floor displaces a column of water
- a series of waves travel outwards at heights believed to be less than 3 feet
- as a wave approaches land, it’s energy compresses into a smaller space forcing it to gain height