What was the height of biggest tsunami waves ever?
In 1963, a man-made megatsunami occurred as a result of human destabilisation of a mountain valley. An enormous slab from the side of Monte Toc, in the mountains north of Venice, Italy, became destabilized as a result of reservoir filling, and slid into the Vajont Dam reservoir at 110 km/h, emptying 50% of the water within 10 minutes. This produced a surge-wave some 250 m (820 ft) high which destroyed several villages and killed about 2000 people. Remarkably, most of the dam survived, although it was rendered almost useless by the infill of the reservoir and structural damage to the I-beams and mechanisms of its interior. Other recent megatsunamis include the 40 metre high waves generated by the collapse of Krakatoa during its eruption in 1883 which killed 36,000 people on Java, Sumatra and the small islands around them; and the collapse of much of Santorini during its cataclysmic eruption around 3,500 years ago which produced a 100-150 metre wave that struck the north coast of Crete a
