Definitions for "Benioff zone"
A zone in the upper mantle, usually beneath an oceanic trench, where a cool, brittle plate, being subducted back into the mantle, gives rise to deep earthquakes.
A dipping zone containing earthquake hypocentres lying along the top of a subducting plate.
an inclined plane along which earthquake foci cluster at a subduction zone. The Benioff zone is believed to correspond to the position of the subducted slab of oceanic lithosphere.
Keywords:  seismic, gap
Seismic Gap