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A theory for the origin of microseisms based on the normal mode propagation of sound in two layers is given. It explains the mechanism of transmission of seismic energy from a storm at sea and predicts that periods of three to nine sec will predominate, depending on the depth of the water and the elastic properties of the bottom. It is shown that this theory can be used to infer elastic properties of the ocean bottom, to a depth of the order of several times the depth of the water, by a study of the periods of microseisms originating from storms whose positions are known.
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Press et al. (1948) studied this question.
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