Ø A tsunami is a series of waves (giant wave) with wavelength of a few km
and
period 10mins to 2 hrs that results from displacements caused by
large
earthquakes (vertical
movement), major submarine slides or exploding
volcanic islands.
Ø Tsunamis are often incorrectly called
tidal waves
Ø Speed of
tsunami is @ 500mph and reaches heights between 50 to 100ft. In
open sea 1 m high, but when reaches the coast they can be as high as
30m and
weigh millions of tons.
Ø The energy released was 4.75lakh kilo tonnes- 23,000
times the energy released
by the atomic
bomb that destroyed HIROSHIMA
Ø In deep
water (greater than 25m), tsunamis are rarely over 1m and will
not be noticed by ships due to their long period.
Ø Moves in
a radial direction from the source.
Ø