“…A number of studies have attributed the observed delay of arrival to additional physical features including thermal or salinity‐based density stratification (Allgeyer & Cummins, ; Watada, ), compressibility of the water column (Allgeyer & Cummins, ; Dalrymple & Rogers, ; Wang, ; Watada, ), and elastic deformation of the underlying solid earth (Allgeyer & Cummins, ; Eyov et al, ; Watada et al, ). Taking a number of typically neglected effects together, the phase speed of surface gravity waves is reduced compared to that of an incompressible fluid due to the combined effects of compressibility, stratification, and elasticity (Baba et al, ). Wang () introduced a depth correction in a shallow water model in order to mimic the effects of compressibility without changing the governing equations.…”