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A giant wave crashed over New York 2,300 years ago, scientists claimed yesterday.
Geological experts say the ancient tsunami dumped sediment, shells and marine fossils across the region that date back to 300BC.
A similar size wave today would flood Wall Street and central Manhattan with salt water.
Because Atlantic tsunamis are so rare, experts had previously given little thought to the possibility of one striking New York City.
But Dr Steven Goodbred, an Earth scientist at Vanderbilt University, said the size and distribution of the material discovered buried beneath the surface suggest
Computer modelling indicates that the resulting initial wave may attain a local amplitude (height) in excess of 600 metres (1,969 ft) and an initial peak to peak height that approximates to 2 kilometres (1 mi), and travel at about 1,000 kilometres per hour (621 mph) (approximately the speed of a jet aircraft), inundating the African coast in about 1 hour, the southern coast of England in about 3.5 hours, and the eastern seaboard of North America in about 6 hours, by which time the initial wave would have subsided into a succession of smaller ones each about 30 metres (98 ft) to 60 metres (197 ft) high.