How Tsunamis Are Formed [Video & Script]

241 comments Written on June 13th, 2011 by
Categories: Videos & Scripts

Would you know how to explain to someone (in English!) what causes earthquakes and tsunamis? Watch the video and learn how tsunamis are formed. If you enjoy this article and exercise, please click on the “RE-TWEET” button below to share it with your friends.

How Earthquakes Trigger Tsunamis - Bang Goes The Theory



DICA: Clique no primeiro botão "Imprima com PrintFriendly" no começo deste texto onde diz "Share the Knowledge" para gerar uma formatação mais simples para impressão.

Fill in the blanks (preencha as lacunas):

Earthquakes are caused by the movement of the huge tectonic plates that continents sit on. What happens is they _______ _________ and one - in this case, the pacific plate - is moving below the Japanese or Eurasian plate.  And it causes that plate to ______ when it _______ there.  There will be a bit too much friction. It will stick. Pressure _______ _____ until, suddenly, it's __________ - and flick!

Have a look at this.  Now this is the tectonic plate that Japan is set on.  And here's the Pacific plate coming down ____________ it.  And normally they want to move together at about 9 cm a year, but sometimes they get _______ . And when they get _______ , the energy of the “moving together” gets translated to strain energy, literally flex(ing) and bending these huge slabs of rock.  And energy ______ and ______ , flexing and bending more and more.

When they finally slip, that __________ energy, all that twist and bend in the rock gets released into ________ movement ... like that!

As you can see, it literally flicks up, moving the ocean floor above it, which moves the ocean, causing a tsunami.

So here we've got a bigger submarine version of what's ________ ____ . And this gives a representation of what's been happening 24 km below the ocean ________ in the Japan trench.
And these things work in what they called a slip-stick way. Most of the time, they're suck, but occasionally they slip. And that's what an earthquake is. So we've got it here. This is bent up here - full of _______ _____ energy waiting to slip. And when the slip happens, that energy gets released into the ocean, causing a series of tsunami waves, moving in both directions across the Pacific.

Scipt and Vocabulary (Tradução Em Português)

Earthquakes are caused by the movement of the huge tectonic plates that continents sit on.

  • huge = enormes
  • that continents sit on = onde estão situados os continentes

What happens is they come together and one - in this case, the pacific plate - is moving below the Japanese or Eurasian plate. And it causes that plate to bend when it sticks there.

  • they come together = eles se encontram
  • bend = “dobrar”, envergar
  • stick = ficar preso

There will be a bit too much friction. It will stick. Pressure builds up until, suddenly, it's released - and flick!

  • (Pressure) builds up = (A pressão) aumenta
  • suddenly = de repente
  • it’s released = é liberado
  • flick = som de uma “chicotada”, som de um movimento rápido

Have a look at this. Now this is the tectonic plate that Japan is set on.  And here's the Pacific plate coming down underneath it. And normally they want to move together at about 9 cm a year, but sometimes they get stuck.  And when they get stuck, the energy of the “moving together” gets translated to strain energy, literally flex(ing) and bending these huge slabs of rock. And energy builds and builds, flexing and bending more and more.

  • have a look at this = dê uma olhada nisto
  • that Japan is set on = no qual está situado o Japão
  • coming down = descend
  • underneath = por baixo
  • get stuck = ficam presos
  • the energy gets translated (in)to = a energia é “traduzida” (convertida) em
  • strain = tensão, pressão
  • slabs = placas (de rocha)
  • flex and bend = flexionar e entortar
  • more and more = cada vez mais

When they finally slip, that stored energy, all that twist and bend in the rock gets released into sudden movement ... like that!

  • stored = armazenado
  • twist and bend = deformação (“torcida”) e curvatura
  • gets released = é liberado
  • sudden movement = movimento repentino
  • like that = assim , desta forma

As you can see, it literally flicks up, moving the ocean floor above it, which moves the ocean, causing a tsunami.

  • flicks up = “pula” (repentinamente) para cima
  • above = acima

So here we've got a bigger submarine version of what's going on. And this gives a representation of what's been happening 24 km below the ocean surface in the Japan trench.

  • what’s going on = o que está acontecendo
  • what’s been happening = o que tem acontecido/ocorrido
  • surface = superfície

And these things work in what they called a slip-stick way. Most of the time, they're suck, but occasionally they slip. And that's what an earthquake is. So we've got it here. This is bent up here - full of pent up energy waiting to slip. And when the slip happens, that energy gets released into the ocean, causing a series of tsunami waves, moving in both directions across the Pacific.

  • stuck = passado de “stick”
  • that’s what = é isso que é
  • bent up = dobrado/envergado para cima
  • pent up (energy) = (energia) “contida”/ “presa” / “ reprimida”
  • released = liberada
  • waves = ondas
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241 comments “How Tsunamis Are Formed [Video & Script]”

Hi Tim I'm really so glad you're back to us with your new site and your news, I've missed you lately. I've just read your posting about earthquakes, and how flick it up over the tectonic plates coming from de underneath, it's really amazing the pent up energy under us. I'll try following you on twitter, it doesn't ring me a bell, 'cause I can't manage it well, but even that, I'll try, it's better having 1 bird in hand than 2 in the bush, haven't it?

Anyway good to see you, and if you allow me I wish posting your comments about earthquakes in Facebook. May I?

Best wishes on your new site

Hugs from Spain

Sure, Vera! Please do! You can use the "facebook" link above to post the article if you'd like. Thank you for your nice comment.