Fig. 2. Lack of repeatability in recent studies of Hawaii: (left) from Li et al. [2008], showing a low-velocity body, interpreted as a plume, tilting from the Big Island of Hawaii to the northwest beneath the Hawaiian island chain; (right) from Wolfe et al. [2009], showing a similar low-velocity body, also interpreted as a plume, except tilting in the exact opposite direction—from beneath the Big Island of Hawaii to the southeast.