The most powerful tsunamis in the history of the Earth, known to us: North Kuril tsunami on November 5, 1952; Japan. March 11, 2011; Chilean tsunami in 1960; Southeast Asia, 2004. December 26; Tsunami of November 1, 1755 in Portugal; A series of tsunamis on August 27, 1883 in the Sunda Strait; Alaska, March 27, 1964; The first mega tsunami. May 21, 1792 eruption of Mount Unzen in Japan; Minoan eruption around 1561-1562 BC - generated, probably, the largest wave in the entire history of mankind; The most famous mega tsunami. Lituya Bay. Alaska; Tsunami in Hawaii 1.4 million years ago; Chicxulub, Yucatan Peninsula. Megatsunami; Proposed catastrophic tidal tsunamis from the nearby Moon 4-3 billion years ago; Earth's collision with Theia 4.47 billion years ago.