The Great Lakes, along with the Mediterranean, Japan and many other parts of the world, have a long history of such waves, which have characteristics similar to tsunamis triggered by earthquakes or landslides. Only recently, however, have scientists unraveled how a storm can create and propagate these far-traveling waves — called meteorological tsunamis or meteotsunamis. The waves, which arise out of a complex interplay of storm speed, wave dynamics and ocean-bottom bathymetry, may be less common than seismic tsunamis, but they can still be destructive and deadly.