Ninety-eight earthquakes in Labrador and the Labrador Sea have been systematically relocated. Their revised locations show a good correlation between seismicity and geolog­ical structures. Most of the earthquakes occur on three structures: the extinct spreading ridge and associated transform faults in the Labrador Sea; the rifted continental margin off Labrador and the transform continental margin southeast of Baffin Island; and a zone of crustal weakness extending from Sept-Iles across southern Labrador to the Cartwright Fracture Zone.