Regular tsunamis are destructive, but mega tsunamis are on another level. Could one really reach skyscraper heights? How are they formed, and what would happen if the biggest one ever hit?

Hawaii has its own history of mega-tsunamis, most recently about 100,000 years ago. “One block of rock that slid off Oahu is the size of Manhattan,” wrote Becky Oskin in Live Science.

The Tonga underwater volcanic eruption rivaled the strength of the largest U.S. nuclear bomb and produced a "mega-tsunami" nearly the height of a 30-story skyscraper, a recent study finds.

A mega tsunami taller than a 50-story skyscraper once engulfed an island off the west coast of Africa, ... generating a titanic wave 1,724 feet high (525 m), the largest ever recorded.

A prediction by a Japanese manga artist has reignited fears of a natural disaster hitting the country this summer.

The largest wave in history: over 1,700 feet and a devastating megatsunami, ... These waves don’t travel far like traditional tsunamis; they hit hard, and close to home.

Unlike smaller tsunamis, which may only produce waves a few feet high, mega tsunamis are on a completely different scale. These waves can soar hundreds even up to 1,000 feet into the sky.

Mega-Tsunamis That Shook the World for 9 Days Revealed in New Satellite ... “Some of the biggest and fastest changes are occurring in the Arctic and in remote regions where we may not see it ...

M<any enormous tsunami's like the one created when the big volcano on the island of Crete blew up around 1650 B.C. and caused 120 waves to hit most of what is present day Egypt, Palestine, Israel ...

A mega-tsunami caused by a landslide in Greenland caused the Earth to vibrate for nine days, a new study has shown. The collapse of a 1.2km-high (0.7 miles) mountain peak last September caused ...

A mega-tsunami caused by a landslide in Greenland caused the Earth to vibrate for nine days, a new study has shown. The collapse of a 1.2km-high (0.7 miles) mountain peak last September caused water ...