Longuet-Higgins introduced the theory of the origin of microseisms and is the inventor of " rhombo blocks ", a mathematical toy consisting of blocks whose faces are rhombuses.
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The theory for microseism generation by standing waves was provided by Michael Longuet-Higgins in 1950, after in 1941 Pierre Bernard suggested this relation with standing waves on the basis of observations.
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These tiny microseisms can be caused by heavy traffic near the seismograph, waves hitting a beach, the wind, and any number of other ordinary things that cause some shaking of the seismograph.
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For periods up to 300 s, the vertical displacement corresponds to Rayleigh waves generated like the primary microseisms, with the difference that it involves the interaction of infragravity waves with the ocean bottom topography.
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He left a legacy of scientific and mathematical publications for the world of oceanography and mathematics, useful for describing the effects of the oceans on climate, sediment and water transport, structural engineering and natural phenomenon such as microseisms, sonoluminescence and underwater sound.
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Also, microseism would result in infinitesimal uneven movement that would shift the Earth's surface such that you would not land in precisely the same position as you were when you jumped . talk ) 18 : 37, 23 February 2010 ( UTC)
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Seismic arrays are not only used to monitor earthquakes and nuclear tests, but also used as a tool for investigating nature and source regions of microseisms as well as locating and tracking volcanic tremor and analyzing complex seismic wave-field properties in volcanic areas.
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His research areas included both pure mathematics ( projective geometry, polytopes, random functions and surfaces ) and applied mathematics ( fluid dynamics, microseisms, the generation of ocean waves by wind, the dynamics of bubbles, sonoluminescence, wave breaking, steep waves, and the exchange of heat and gases at the ocean surface ).
