Halting Tsunamis in their Tracks

Discussion in 'Earth Science' started by paddoboy, Jan 25, 2017.

  1. paddoboy Valued Senior Member

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    Researcher proposes novel mechanism to stop tsunamis in their tracks
    January 25, 2017

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    Indian Ocean (Jan. 2, 2005). A village near the coast of Sumatra lays in ruin after the Tsunami that struck South East Asia. Image: Wikipedia
    Devastating tsunamis could be halted before hitting the Earth's shoreline by firing deep-ocean sound waves at the oncoming mass of water, new research has proposed.

    Dr Usama Kadri, from Cardiff University's School of Mathematics, believes that lives could ultimately be saved by using acoustic-gravity waves (AGWs) against tsunamis that are triggered by earthquakes, landslides and other violent geological events.

    AGWs are naturally occurring sounds waves that move through the deep ocean at the speed of sound and can travel thousands of metres below the surface.





    Read more at: https://phys.org/news/2017-01-mechanism-tsunamis-tracks.html#jCp
     
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  3. paddoboy Valued Senior Member

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    http://www.heliyon.com/article/e00234

    Tsunami mitigation by resonant triad interaction with acoustic–gravity waves

    Abstract
    Tsunamis have been responsible for the loss of almost a half million lives, widespread long lasting destruction, profound environmental effects, and global financial crisis, within the last two decades. The main tsunami properties that determine the size of impact at the shoreline are its wavelength and amplitude in the ocean. Here, we show that it is in principle possible to reduce the amplitude of a tsunami, and redistribute its energy over a larger space, through forcing it to interact with resonating acoustic–gravity waves. In practice, generating the appropriate acoustic–gravity modes introduces serious challenges due to the high energy required for an effective interaction. However, if the findings are extended to realistic tsunami properties and geometries, we might be able to mitigate tsunamis and so save lives and properties. Moreover, such a mitigation technique would allow for the harnessing of the tsunami's energy.
     
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  5. billvon Valued Senior Member

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    Interesting. I read a science fiction story about doing just this about 20 years ago.
     
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  7. Walter L. Wagner Cosmic Truth Seeker Valued Senior Member

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    Gotta be comparable energies. Maybe you could lead the 'nuke the tsunamis' band-wagon, get lots of government funding for the research.
     
  8. origin Trump is the best argument against a democracy. Valued Senior Member

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    Save the buildings and people by killing god knows how many sea creatures. This sounds like at a minimum it would be devastating to the whales and dolphins in a large area around the acoustic wave.
     
  9. paddoboy Valued Senior Member

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    While your thoughts are quite admirable and worthwhile, and it genuinely has my total sympathy, when we think of the damage, destruction, loss of life and heartache that Tsunamis such as that which devastated parts of Japan a few years ago, and the 2004 Earthquake and Tsunami that resulted in excess of 230,000 lost lives, do we really have a choice?
     
  10. origin Trump is the best argument against a democracy. Valued Senior Member

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    Sure.
     

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