The term 'epicentre' is used to describe the point on the Earth's surface directly above the FOCUS of an earthquake. The FOCUS is the point within the Earth where the seismic waves originate, and the epicentre is the point on the surface directly above it. The term 'HUB' is often used to describe a centre of activity or a place where people come together. In this context, the epicentre can be thought of as the HUB of an earthquake, the point from which the seismic waves radiate outwards.