Megatsunami are well-documented in the geological record. [0] One of the more interesting ones occurred in Hawaii when the flank of the East Molokai Volcano col

Megatsunami are well-documented in the geological record. [0] One of the more interesting ones occurred in Hawaii when the flank of the East Molokai Volcano collapsed, creating what are believed to have been 600 meter high waves in the vicinity. [1] It's common to discount such disasters because they generally happen at intervals 10 to 1000x greater than human lifespans, and the most catastrophic events occurred in prehistoric times. It's likely we don't know even half the story as the recognition of these events is relatively recent. [0] https://en.wikipedia.org/wiki/Megatsunami https://en.wikipedia.org/wiki/Megatsunami [1] https://en.wikipedia.org/wiki/East_Molokai_Volcano https://en.wikipedia.org/wiki/East_Molokai_Volcano Edit: added footnote