Volcano's collapse caused mega-tsunami 240 metres high – study

Scientists warn that similar event to collapse of volcano on Cape Verdean island of Fogo 73,000 years ago poses major threat to nearby islands

The sudden collapse of a volcano caused a tsunami that created waves up to 240 metres (800ft) high 73,000 years ago, scientists have discovered.

The mega-tsunami took place near the Cape Verde islands off west Africa when the slopes of the volcano gave way - a process known as a "flank collapse" - and some experts fear a similar collapse could present a real threat today, especially around volcanic islands.