Tsunamis are super gravity waves. They cause incredible amounts of destruction and disrupt landscapes in seemingly impossible ways. There are terrifying to think about, even more so to witness but how do these super large waves of catastrophe occur?
Mostly, Tsunamis are caused by earthquakes beginning on the seabed. Most Tsunami’s happen somewhere along the Pacific Rim. At the place of the earthquake, the waves are not so large, ranging from about 0.01-0.5m high. As the waves move closer to the shore, the crests become closer and closer together and as it approaches the coast, the entire mass of water is moving as one super large wave.
The super large gravity wave known as the Tsunami hits the coast and the extent of the destruction now depends on the landscape. A standard shore can see waves ranging from 10-50m high but intricate bays and valleys see incredibly large waves over this height.
In the last 50 years there have been 9 significant Tsunamis, the most destructive occurring in Sumatra, Indonesia. The highest wave here was 50.9m high and it affected over 200,000 people!