Abstract
A method for obtaining the directional wave spectra from the data of the orbital wave velocities is given by using the results of observations at the beach of Tokaimura, Ibaragi Prefecture, and that in the shallow water near Mikuni Harbor, Fukui Prefecture. In the case of observations at Tokaimura, the groups of swells are identified and their sources are determined from the observed directional properties. The observations at Mikuni show some behaviors of wave refraction in the shallow water having complicated bottom topography.

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