At the head of Lituya Bay, Alaska, on July 10, 1958, an earthquake of magnitude 7.3 triggered a gigantic rock fall, later estimated as measuring forty million cubic yards, at the headland of the bay and a resultant 1,700-foot-high tsunami wave because of the water that was displaced.

This was so big that it is known scientifically as a megatsunami. The wave was brought on by an enormous 8.3 magnitude earthquake that hit the Fairweather Fault and caused a massive earth landslide. Over the years Tsunamis have killed thousands and thousands of people,In a year the approximate number of people have died is 7,916. Here's on the effects of narrow and/or shallow waterways on tsunamis. Lituya Bay's inlets are a case of this, increasing the wave. This case study examines the tsunami which happened in 1958 in Lituya Bay on the Alaska’s west coast. What has been the most devastating Tsunami ever? This was the largest earthquake in Alaska since the quake in Yakutat, near Lituya Bay, in 1899. Well it is normally about 3 foot (1 meter) high. Whoa, that’s one seriously tall wave. On July 10, 1958, an earthquake Mw 8.3 along the Fairweather fault triggered a major subaerial landslide into Gilbert Inlet at the head of Lituya Bay on the southern coast of Alaska. In 2011 japan had a huge Tsunami that killed 19,00 people.

Extreme deforestation by the great water run up was one of the severe consequences. If anyone wants to add the information, that's why some question it being a mega-tsunami, it makes the wave more extreme than if it … Beginning with an earthquake which triggered a landslide, resulted in a unique tsunami. At 1,720 feet up the shore⁠—about a third of a mile⁠—the 1958 Lituya Bay event was several times higher than the previously recorded maximum height of a tsunami breaking on an ocean shore.

Unlike during the Lituya Bay tsunami -- during which three anchored boats were sunk by or rode atop a 100-foot wall of water -- no fishermen were in Taan Bay at the time of the slide. Now a tsunami wave can reach a height of 100 feet (30.48 meters) high, that’s amazing. The biggest Tsunami that has ever happened was in Lituya Bay, Alaska,and reached over 1720 feet.

The biggest tsunami in present times struck at Lituya Bay, Alaska on July 9, 1958. July 9, 1958: Regarded as the largest recorded in modern times, the tsunami in Lituya Bay, Alaska was caused by a landslide triggered by an 8.3 magnitude earthquake.
Figure 5. But the highest recorded one was the 1958 Lituya Bay, Alaska Megatsunami with a recorded height of 1,719 feet (524 meters). Earthquake… That decrees our population quite a it. Waves reached a … Biggest Wave: Lituya Bay Mega Tsunami USGS Aerial photo of Lituya Bay taken after July 9, 1958 event . The landslide impacted the water at high speed generating a giant tsunami and the highest wave runup in recorded history.
Note the extent of the non-forested areas of land lining the shore of the bay, which marks the approximate reach of the tsunami's runup.