Total Nuclear Testing Yields

From 1945 until 1998, there have been over 2,000 nuclear tests conducted worldwide.

Country Atmospheric Underground Total Yields
China 21.9 1.5 23.4
France 10.0 4.0 14.0
India - 0.014-0.017 0.014-0.017
Pakistan - 0.014-0.017 0.014-0.017
North Korea - 0.010-0.036 0.010-0.036
Russia/USSR 247.0 38.0 285.0
United Kingdom 8.0 0.9 8.9
United States 141.0 38.0 179.0
(in megatons) 427.9 ~82.428 ~510.328

Source: National Resources Defense Council

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National Science FoundationNational Science Digital LibraryNuclear Pathways Member SiteThis project is part of the National Science Digital Library and was funded by the Division of Undergraduate Education, National Science Foundation Grant 0434253