Prehistoric tsunamis are tsunamis and so-called "megatsunamis" that occurred before recorded history. The events have been identified through oral tradition and/or geological evidence. Those events that have been identified through contemporary records are listed as historic tsunamis.
List
Approx. date Location Cause Evidence for tsunami66 million years BPChicxulub crater, Yucatanasteroid strikepresumed35.5 million years BPChesapeake Baybolide impactpresumedPoag, C. Wiley. Chesapeake Invader: Discovering America's Giant Meteorite Crater. Princeton, NJ: Princeton University Press, 1999. 10,000 yrs BPSeton Portage, British Columbialandslide into lakepresumed8,000 years BPMount Etna, Sicilyvolcanic landslidesubmarine sediments off Etna, submerged settlements off eastern Mediterranean coast, e.g. Atlit Yam8,000 years BPNorwegian Seasubmarine landslip (Storegga Slide)deposited sediments in Scotland5,500 BPNorthern Islestsunami (Garth tsunami)deposits and contemporaneous mass burials4,000 BPRéunion islandlandslidepresumedMega-tsunami: Wave of Destruction. Background article. BBC Two television programme first broadcast 12 October 2000
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