900 Foot Megatsunami? Scientists Discover Tsunami Evidence in Africa.. A new study reveals evidence how an ancient 900 foot megatsunami wave caused widespread destruction in Cape Verde. It happened around 78,000 years ago October 4, 2015 by The Horror Report 900 Foot Megatsunami? Scientists Discover Tsunami Evidence in Africa.. A new study reveals evidence how an ancient 900 foot megatsunami wave caused widespread destruction in Cape Verde. It happened around 78,000 years ago Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Like this:Like Loading... You may also be interested in these