The Modern Megatsunamis
A tsunami is quite horrible and tragic - the 2011 Japanese and 2004 Indonesian tsunamis being great examples. https://www.youtube.com/watch?v=RDOuwMj7Xzo However, they're not as scary as megatsunamis . Whereas a regular tsunami starts out at sea after an earthquake, a megatsunami is created nearer the shore - or even in a lake - by the force or an impact, usually a giant landslide, although in the ancient past they were also caused by asteroids. Whereas a tsunami can take hours to reach land and become a wave, a megatsunami wave is created instantaneously, frequently much larger than a regular tsunami wave, with a much greater surge - meaning hills & mountains offer little protection. And you don't even need to be anywhere near the ocean to be affected - two of the 3 megatsunamis last century took place in mountain lakes/reservoirs, a long way from the ocean. THE LARGEST WAVE IN MODERN HISTORY (LITUYA BAY, ALASKA, USA - 1958) Prior to the 1958 earthquake that put m...