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    Pressure field induced in the water column by acoustic-gravity waves generated from sea bottom motion

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    Oliveira_et_al-2016-Journal_of_Geophysical_Research__Oceans.pdf (1.540Mb)
    Date
    2016-10-24
    Author
    Oliveira, Tiago C. A.  Concept link
    Kadri, Usama  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/8631
    As published
    https://doi.org/10.1002/2016JC011742
    DOI
    10.1002/2016JC011742
    Keyword
     Acoustic-gravity waves; Submarine earthquake; Early tsunami detection system 
    Abstract
    An uplift of the ocean bottom caused by a submarine earthquake can trigger acoustic-gravity waves that travel at near the speed of sound in water and thus may act as early tsunami precursors. We study the spatiotemporal evolution of the pressure field induced by acoustic-gravity modes during submarine earthquakes, analytically. We show that these modes may all induce comparable temporal variations in pressure at different water depths in regions far from the epicenter, though the pressure field depends on the presence of a leading acoustic-gravity wave mode. Practically, this can assist in the implementation of an early tsunami detection system by identifying the pressure and frequency ranges of measurement equipment and appropriate installation locations.
    Description
    Author Posting. © American Geophysical Union, 2016. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 121 (2016): 7795–7803, doi:10.1002/2016JC011742.
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    • Applied Ocean Physics and Engineering (AOP&E)
    Suggested Citation
    Journal of Geophysical Research: Oceans 121 (2016): 7795–7803
     

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