A temporary seismograph network was operated in a seismically active region of northern Baffin Bay during part of September–October 1978. The array comprised three portable smoked-paper seismographs on Baffin Island and three ocean-bottom seismographs in Baffin Bay. During the experiment a number of earthquakes were recorded sufficiently well to be located by an iterative procedure. Two seismicity regimes are distinguished. The first is a narrow onshore zone of shallow (