Last modified on October 10, 2008, at 23:42

Tidal wave

Turnagain Bore, Alaska
A tidal wave is a wave of water caused by the action of tidal forces. A well known example of this is the Severn bore in England. As the sea-level rises due the tidal action of the moon the water is funnelled by the narrowing of the Bristol Channel back up the River Severn, sometimes as far Tewkesbury. This phenomenon may be observed in many other places around the world with a large tidal range and a river estuary.

Large waves which travel aross oceans caused by large coastal displacements or submarine earthquakes are popularly known as tidal waves but are more properly known as tsunamis.