Scientists have affirmed that megatsunamis are a reality. They shared such an event that took place 73,000 years ago. At that time, a large slope from the volcanic island Fogo in the Cape Verde islands off the coast of Africa fell in the ocean and led to a tsunami capable of moving mountains.

Study's lead researcher Ricardo Ramalho explained, "You're displacing a huge mass, which must generate movement of water. And in the case of volcanic flank collapses they can be very acute, because you have all the mass collapsing basically into the oceans".

There were many assumptions with regard to Fogo collapse. Ramalho and his colleagues have traced the boulders' origin to the cliff below. The researchers came to know the boulders were made up of marine rock and the surrounding area was made up of volcanic rock.

As per the researchers, there was just one force that move these rock and that was megatsunami. The researchers then studied isotopes on rock surfaces and dated the 00-ton rocks back to the same time in history when Fogo's volcanic collapse took place.

The research paper published in the journal Science Advances has unveiled that flank collapses may trigger tsunamis of massive height and energy leading to great damage. Researchers think that a similar collapse can take place, but they do not want that their theory should lead to mega-freakout.

"exclusively crop out on the cliff faces and lower slopes of the plateau, implying a source at considerably lower elevations."
"We need to start thinking coolly and rationally, what can be done in terms of disaster risk reduction," Ramalho told the Monitor. "How may we respond to such a crisis, and what measures can be taken at short, medium and long term to increase our society's resilience to their threat?"