Hypocenter

Hypocenter (Focus) and epicenter of an earthquake

The hypocenter (literally: 'below the center') is the site of an earthquake or a nuclear explosion. In an earthquake, it is a synonym of the focus.^[1] In the case of a nuclear explosion, it is a synonym of ground zero.

Hypocenter Media

In mapping the effects of an atomic bomb, such as on the city of Hiroshima here, concentric circles are drawn centered on the point below the detonation and numbered at radial distances of 1,000 feet (305 meters). This point below the detonation is called "Ground Zero".
Monument marking the hypocenter, or ground zero, of the atomic bomb explosion over Hiroshima.
The former hot dog stand nicknamed Cafe Ground Zero in the Pentagon's center courtyard.
Aerial view of the World Trade Center site in September 2001.
Hypocenter (Focus) and epicenter of an earthquake

References

↑ The hypocenter is the point within the earth where an earthquake rupture starts. The epicenter is the point directly above it at the surface of the Earth. Also commonly termed the focus. "Earthquake Glossary - hypocenter". United States Geological Survey. Archived from the original on 15 March 2010. [1]

[USGS-1] The hypocenter is the point within the earth where an earthquake rupture starts. The epicenter is the point directly above it at the surface of the Earth. Also commonly termed the focus. "Earthquake Glossary - hypocenter". United States Geological Survey. Archived from the original on 15 March 2010. [1]

[1]