Supplement to: Tarduno, John A; Duncan, Robert A; Scholl, David W; Cottrell, Rory D; Steinberger, Bernhard; Thordarson, Thorvaldur; Kerr, Bryan C; Neal, Clive R; Frey, Frederick A; Torii, Masayuki; Carvallo, Claire (2003): The Emperor Seamounts: Southward motion of the Hawaiian hotspot plume in earth's mantle. Science, 301(5636), 1064-1069, https://doi.org/10.1126/science.1086442