Abstract
IT is well known1 that the pressure variations beneath a progressive gravity wave of Stokes‘s type are insufficient, in deep water, to generate microseisms of the observed magnitude. This is because the pressure variations on the sea-bed decrease exponentially with the depth. The following argument, however, shows the existence, in a general class of wave motions, of ‘second-order' pressure variations which are not attenuated with the depth.
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References
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LONGUET-HIGGINS, M., URSELL, F. Sea Waves and Microseisms. Nature 162, 700 (1948). https://doi.org/10.1038/162700a0
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DOI: https://doi.org/10.1038/162700a0
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