World's Tallest Tsunami A tsunami with a record run-up height of 1720 feet occurred in Lituya Bay, Alaska Lituya Bay: The photo above shows Lituya Bay, from an aircraft over the Gulf of Alaska. The landslide that triggered the tsunami originated from the top of the steep cliffs along the far left side of the bay. About 40 million cubic feet of rock fell into Gilbert Inlet (not visible in this view