Infragravity Wave 2
Infragravity Wave 2 : Infragravity waves are the component of ocean waves at periods longer than 25 seconds. Infragravity waves control long period (>30 seconds) vertical component seismic noise levels at the seafloor and at coastal sites on land. Infragravity waves are trapped along shorelines as edge waves or surfbeat and are generated by nonlinear mechanisms by the interaction of shorter period (wind driven) ocean waves along coastlines. See: Webb (2002, p. 307)
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