Fig. 1From: Numerical experiments on tsunami flow depth prediction for clustered areas using regression and machine learning modelsa Regional map of the study area. The dotted lines are the plate boundaries proposed by Bird (2003). b Tsunami computational area. Black rectangular areas indicate nesting layers. Red star shapes are the locations of the seafloor pressure gauges of the DONET observatory. Coordinate system is Japan plain rectangular coordinate system IV. c Tsunami prediction area. Color refers to clustered areas for the tsunami flow depth using the k-means method. Terrestrial contours indicate elevation, with an interval of 50 mBack to article page