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The nuclear weapons tests of the United States were performed from 1945 to 1992 as part of the nuclear arms race. The United States conducted around 1,054 nuclear tests by official count, including 216 atmospheric, underwater, and space tests.
Castle Bravo shot of 1 March 1954, was the first test of a deployable (solid fuel) thermonuclear weapon, and also (accidentally) the largest weapon ever tested by the United States (15 megatons). It was also the single largest U.S. radiological accident in connection with nuclear testing.
- Tests by Country
- Known Tests
- Alleged Tests
- Tests of Live Warheads on Rockets
- Most Powerful Tests
- External Links
The table in this section summarizes all worldwide nuclear testing (including the two bombs dropped in combat which were not tests). The country names are links to summary articles for each country, which may in turn be used to drill down to test series articles which contain details on every known nuclear explosion and test. The notes attached to ...
In the following subsections, a selection of significant tests (by no means exhaustive) is listed, representative of the testing effort in each nuclear country.
There have been a number of significant alleged, disputed or unacknowledged accounts of countries testing nuclear explosives. Their status is either not certain or entirely disputed by most mainstream experts.
Missiles and nuclear warheads have usually been tested separately because testing them together is considered highly dangerous; they are certainly the most extreme type of live fire exercise. The only US live test of an operational missile was the following: 1. Frigate Bird: on May 6, 1962, a UGM-27 Polaris A-2 missile with a live 600 kt W47 warhea...
The following is a list of the most powerful nuclear weapon tests. All tests on the first chart were multi-stage thermonuclear weapons.
Video archive of nuclear weapon testing Archived 2012-12-05 at archive.todayJul 16, 2020 · The US ended all underground nuclear tests in the early 1990s in the lead-up to the Comprehensive Nuclear Test Ban Treaty, despite protests from the heads of the nation’s three national...
Mar 7, 2016 · On 16 July 1945, Trinity – the first nuclear explosion ever – was conducted by the US Army in the Jornada del Muerto desert, New Mexico. This successful, experimental trial – resulting in the detonation of a spherical bomb nicknamed 'The Gadget' – ushered in a new nuclear age and arms race, with several nations subsequently developing ...
Sep 23, 2018 · The last US nuclear weapons test took place on Sept. 23, 1992, at the Nevada Test Site. It was the 1,030th such experiment, the most conducted by any country since the first US atom bomb...
United States . First nuclear test: July 16, 1945 Most recent nuclear test: Sept. 23, 1992 Total tests: 1,030 (815 underground) The United States has conducted more tests than the rest of the world, and was the first and only country to use a nuclear weapon in wartime.
