O que é um TSUNAMI e como ele se forma?


Tsunamis are giant and destructive waves. And they are caused by a rapid movement in
the water body of the oceans. Typically due to earthquakes, large volcanic
island explosions, meteorite crashes and landslides of large rock blocks and even atomic explosions. But in most cases tsunamis occur by an earthquake. Resulting from a drive on a geological fault. And the water displacement is usually not
more than one meter high. And this displacement propagates in all directions
with speeds that depend on the depth of the sea. At sea the waves travel rapidly but have a
small amplitude and a wavelength of hundreds of meters. A very large wavelength. However, when the wave approaches the coast
the sea is shallower. Which causes the wave to slow down and the
energy to accumulate in a smaller amount of water. It means the length of it decreases and its
amplitude increases. There are tsunami waves that reach 30 meters
for example. And tsunamis are common in the Pacific Ocean
since there are reverse geologic faults there. And there are currently tsunami alarm systems,
and these systems rely on rapid determination of epicenters, magnitudes, and fault orientation. In addition to the mathematical modeling of
tsunami waves and real time measurements recorded by sensors on the ocean floor. Well that’s it from there until the next episode.

2 thoughts on “O que é um TSUNAMI e como ele se forma?

  1. Lembrei-me de alguns episódios. O primeiro foi o desabamento de geleira, acontecido há muitos anos, num lago da Patagônia, houve inclusive vítimas da onda formada. Desabamentos como estes → https://youtu.be/BCzkGaV3zT0?t=46 → https://youtu.be/bcZsqpLwVK8?t=163
    O segundo foram ondas numa praia que conheço e gosto muito, estes aqui → https://youtu.be/SUZvmasi6tA → https://youtu.be/VmBoz1Vqx1Q
    Trata-se de 'tsunami meteorológico', conhecido por freak wave. Outros registros:
    https://youtu.be/4iKuJ4DOVXk
    https://youtu.be/96RVk8ZK0ko
    https://youtu.be/_akyfMp9ln8
    https://youtu.be/pGo9ysoFjk0

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