Tsunami ( Foto/pict )

The most destructive waves in the ocean are
tsunamis, often wrongly
called tidal waves. They are not caused by tides or even by the wind,
but by underwater earthquakes, landslides or volcanic eruptions. These
disturbances cause the sea bed to move very quickly, which shifts a
large amount of water and disrupts the sea surface. A train of waves is
set in motion which travel away from the of disturbance.

Tsunamis travel extremely fast - up to.

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