Ground zero (disambiguation)

Ground zero describes the point on the Earth's surface (its hypocenter) closest to a nuclear detonation. In the case of an explosion above the ground, ground zero refers to the point on the ground directly below the nuclear detonation.

Ground zero may also refer to:

• The World Trade Center site in New York City, after the September 11 attacks
• The hypocenters of the atomic bombings of Hiroshima and Nagasaki
• The central plaza of The Pentagon during the Cold War