Ocean waves and microseisms

Abstract eng:
Ocean gravity waves generate pressure variations on the sea floor, which may lead to microseisms. Secondary microseisms are due to the interaction of surface waves with nearly equal frequencies but nearly opposite directions. A theoretical analysis with goal to quantify the degree of nearness that must be reached for the occurrence of such phenomena is presented. Based on a weakly nonlinear analysis expressions are obtained for the free surface elevation and pressure of interacting waves. Results are discussed for various regimes.

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