ground zero of a nuclear explosion

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• Ground Zero Indicator — The Ground Zero Indicator, known by the accronym GZI was a specially designed shadowgraph instrument used by the British Royal Observer Corps during the Cold War to locate the Ground Zero of any nuclear explosion.OverviewThe GZI consisted of four …   Wikipedia

• Ground zero (disambiguation) — Ground zero is the site directly below, directly above, or at the point of detonation of an explosionGround zero may also refer to:Attack zones* The sites of the detonation of the atomic bombs at Hiroshima and Nagasaki in 1945. * The World Trade… …   Wikipedia

• ground zero — noun uncount 1. ) the point on the surface of the Earth directly above or below where a nuclear explosion has happened 2. ) a place at the center of changes that are happening fast or violently: Silicon Valley remains ground zero for the… …   Usage of the words and phrases in modern English

• Ground zero — [ Hiroshima Prefectural Industrial Promotion Hall was only 150 m from the hypocenter, or ground zero, of the atomic bomb explosion over Hiroshima.] The term Ground Zero may be used to describe the point on the earth s surface where an explosion… …   Wikipedia

• ground zero — n. point of nuclear explosion, point of explosion on earth s surface directly below or directly above of a nuclear bomb; target of a missile or bomb; (Informal) the very beginning or start, most basic level; (Slang) very messy and dirty messy… …   English contemporary dictionary

• ground zero — noun Date: 1946 1. the point directly above, below, or at which a nuclear explosion occurs 2. the center or origin of rapid, intense, or violent activity or change; broadly center 2a < the party town that served as ground zero for those… …   New Collegiate Dictionary

• ground zero — UK / US noun [uncountable] 1) the point on the surface of the Earth directly above or below where a nuclear explosion has happened 2) a place at the centre of changes that are happening fast or violently Silicon Valley remains ground zero for the …   English dictionary

• ˌground ˈzero — noun [U] 1) a place where a lot of people have been killed, or a lot of damage has been done, especially because of a nuclear explosion 2) a place where changes are happening quickly or violently …   Dictionary for writing and speaking English

• High altitude nuclear explosion — High altitude nuclear explosions have historically been nuclear explosions which take place above altitudes of 50 km, still inside the Earth s atmosphere. Such explosions have been tests of nuclear weapons, used to determine the effects of the… …   Wikipedia

• Nuclear testing — Nuclear weapons tests are experiments carried out to determine the effectiveness, yield and explosive capability of nuclear weapons. Throughout the twentieth century, most nations that have developed nuclear weapons have tested them. Testing… …   Wikipedia

• Nuclear warfare — Nuclear War redirects here. For other uses, see Nuclear War (disambiguation). Warfare Military history Eras Prehistoric Ancie …   Wikipedia