The point on the surface of the earth directly above the focus of an earthquake or directly above or below a nuclear explosion.
Geology and Earth Sciences
The point on the Earth’s surface immediately overlying an earthquake focus (the hypocentre).
Geography
The point of the Earth’s surface which is directly above the focus of an earthquake, usually 0–50 km below it. See Bondár et al. (2004) Geophys. J. Int. 156, 3 on epicentre accuracy based on seismic network criteria.