<P> The nuclear weapons tests of the United States were performed between 1945 and 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 . Most of the tests took place at the Nevada Test Site (NNSS / NTS) and the Pacific Proving Grounds in the Marshall Islands and off Kiritimati Island in the Pacific, plus three in the Atlantic Ocean . Ten other tests took place at various locations in the United States, including Alaska, Nevada other than the NNSS / NTS, Colorado, Mississippi, and New Mexico . </P> <Table> United States' nuclear testing series summary - Link to world summary of nuclear weapons tests <Tr> <Th> Series or years </Th> <Th> Years covered </Th> <Th> Tests </Th> <Th> Devices fired </Th> <Th> Devices with unknown yield </Th> <Th> Peaceful use tests </Th> <Th> Non-PTBT tests </Th> <Th> Yield range (kilotons) </Th> <Th> Total yield (kilotons) </Th> <Th> Notes </Th> </Tr> <Tr> <Th> Alberta </Th> <Td> 1942--1945 </Td> <Td> 0003! 3 </Td> <Td> 0003! 3 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0003! 3 </Td> <Td> 15 to 21 </Td> <Td> 0057! 57 </Td> <Td> The project to pursue the Atomic Bomb and use it against WWII belligerents . </Td> </Tr> <Tr> <Th> Crossroads </Th> <Td> 1946 </Td> <Td> 0002! 2 </Td> <Td> 0002! 2 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0002! 2 </Td> <Td> 21 </Td> <Td> 0042! 42 </Td> <Td> First postwar test series . </Td> </Tr> <Tr> <Th> Sandstone </Th> <Td> 1948 </Td> <Td> 0003! 3 </Td> <Td> 0003! 3 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0003! 3 </Td> <Td> 18 to 49 </Td> <Td> 0104! 104 </Td> <Td> The first use of "levitated" cores made of Oralloy . Tested components for Mark 4 design . </Td> </Tr> <Tr> <Th> Ranger </Th> <Td> 1951 </Td> <Td> 0005! 5 </Td> <Td> 0005! 5 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0005! 5 </Td> <Td> 1 to 22 </Td> <Td> 0040! 40 </Td> <Td> First tests at the Nevada Test Site . Operation originally named "Operation Faust". </Td> </Tr> <Tr> <Th> Greenhouse </Th> <Td> 1951 </Td> <Td> 0004! 4 </Td> <Td> 0004! 4 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0004! 4 </Td> <Td> 46 to 225 </Td> <Td> 0398! 398 </Td> <Td> George shot was physics experiment relating to the hydrogen bomb; Item shot was first boosted fission weapon . </Td> </Tr> <Tr> <Th> Buster - Jangle </Th> <Td> 1951 </Td> <Td> 0007! 7 </Td> <Td> 0007! 7 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0007! 7 </Td> <Td> small to 31 </Td> <Td> 0072! 72 </Td> <Td> The first series in which troop maneuvers (Desert Rock exercises) were performed . </Td> </Tr> <Tr> <Th> Tumbler - Snapper </Th> <Td> 1952 </Td> <Td> 0008! 8 </Td> <Td> 0008! 8 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0008! 8 </Td> <Td> 1 to 31 </Td> <Td> 0104! 104 </Td> <Td> </Td> </Tr> <Tr> <Th> Ivy </Th> <Td> 1952 </Td> <Td> 0002! 2 </Td> <Td> 0002! 2 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0002! 2 </Td> <Td> 500 to 10,400 </Td> <Td> 10900! 10,900 </Td> <Td> The "Mike" shot was the first multi-megaton thermonuclear weapon . </Td> </Tr> <Tr> <Th> Upshot - Knothole </Th> <Td> 1953 </Td> <Td> 0011! 11 </Td> <Td> 0011! 11 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0011! 11 </Td> <Td> small to 61 </Td> <Td> 0252! 252 </Td> <Td> 18,000 men exposed in Desert Rock V up to 26.6 REM. 84 exceeded current yearly limits of 5 REM / yr . </Td> </Tr> <Tr> <Th> Castle </Th> <Td> 1954 </Td> <Td> 0006! 6 </Td> <Td> 0006! 6 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0006! 6 </Td> <Td> 110 to 15,000 </Td> <Td> 48200! 48,200 </Td> <Td> Bravo shot inspired secret Project 4.1 to study fallout victims . It over-produced by 250% of expected yield, caused fallout over a wide area . </Td> </Tr> <Tr> <Th> Teapot </Th> <Td> 1955 </Td> <Td> 0014! 14 </Td> <Td> 0014! 14 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0014! 14 </Td> <Td> 1 to 43 </Td> <Td> 0167! 167 </Td> <Td> </Td> </Tr> <Tr> <Th> Wigwam </Th> <Td> 1955 </Td> <Td> 0001! 1 </Td> <Td> 0001! 1 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0001! 1 </Td> <Td> 30 </Td> <Td> 0030! 30 </Td> <Td> </Td> </Tr> <Tr> <Th> Project 56 </Th> <Td> 1955--56 </Td> <Td> 0004! 4 </Td> <Td> 0004! 4 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0004! 4 </Td> <Td> 0 to 0 </Td> <Td> 0000! 0 </Td> <Td> </Td> </Tr> <Tr> <Th> Redwing </Th> <Td> 1956 </Td> <Td> 0017! 17 </Td> <Td> 0017! 17 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0017! 17 </Td> <Td> small to 5,000 </Td> <Td> 20820! 20,820 </Td> <Td> Test with "energy budget". Competition between UCRL and LASL over budget allocation was high . </Td> </Tr> <Tr> <Th> Project 57 </Th> <Td> 1957 </Td> <Td> 0001! 1 </Td> <Td> 0001! 1 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0001! 1 </Td> <Td> 0 </Td> <Td> 0000! 0 </Td> <Td> The first safety test, asking whether an improperly ignited bomb (as in a plane crash) would cause a nuclear blast . </Td> </Tr> <Tr> <Th> Plumbbob </Th> <Td> 1957 </Td> <Td> 0029! 29 </Td> <Td> 0029! 29 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0025! 25 </Td> <Td> 0 to 74 </Td> <Td> 0345! 345 </Td> <Td> Included the largest atmospheric test in CONUS . </Td> </Tr> <Tr> <Th> Project 58 + 58A </Th> <Td> 1957 </Td> <Td> 0004! 4 </Td> <Td> 0004! 4 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0001! 1 </Td> <Td> small to 1 </Td> <Td> 0001! 1 </Td> <Td> Four more safety tests . </Td> </Tr> <Tr> <Th> Hardtack I </Th> <Td> 1958 </Td> <Td> 0035! 35 </Td> <Td> 0035! 35 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0035! 35 </Td> <Td> 0 to 9,300 </Td> <Td> 35628! 35,628 </Td> <Td> A series in the Pacific Proving Ground, including three rocket boosted high altitude tests called Operation Newsreel . </Td> </Tr> <Tr> <Th> Argus </Th> <Td> 1958 </Td> <Td> 0003! 3 </Td> <Td> 0003! 3 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0003! 3 </Td> <Td> </Td> <Td> 0004! 4 </Td> <Td> Also known as Operation Floral before becoming Argus for security reasons . Tested three weapons in the South Atlantic, trying to create an artificial energy belt in the magnetosphere . </Td> </Tr> <Tr> <Th> Hardtack II </Th> <Td> 1958 </Td> <Td> 0037! 37 </Td> <Td> 0037! 37 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0024! 24 </Td> <Td> 0 to 22 </Td> <Td> 0046! 46 </Td> <Td> Meant to squeeze all possible testing into the time before Eisenhower's test ban started on 30 October 1958 . Planned as "Operation Millrace", changed to HT II when a science panel recommended to "stop testing after the Hardtack series ." </Td> </Tr> <Tr> <Th> Nougat </Th> <Td> 1961--62 </Td> <Td> 0044! 44 </Td> <Td> 0044! 44 </Td> <Td> 0000! </Td> <Td> 0001! 1 </Td> <Td> 0002! 2 </Td> <Td> small to 67 </Td> <Td> 0357! 357 </Td> <Td> First all - underground test series . Included first Operation Plowshare shot "Gnome" in Carlsbad, New Mexico, which was detonated in an underground salt dome . </Td> </Tr> <Tr> <Th> Sunbeam </Th> <Td> 1962 </Td> <Td> 0004! 4 </Td> <Td> 0004! 4 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0004! 4 </Td> <Td> small to 2 </Td> <Td> 0002! 2 </Td> <Td> Aka Operation Dominic II . Test of small tactical warheads, including the man - portable "Davy Crockett". Last atmospheric test series . The Army's part of Sunbeam was Operation Ivy Flats . </Td> </Tr> <Tr> <Th> Dominic </Th> <Td> 1962--63 </Td> <Td> 0031! 31 </Td> <Td> 0031! 31 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0031! 31 </Td> <Td> 2 to 8,300 </Td> <Td> 34640! 34,640 </Td> <Td> "Frigate Bird" was the only operational test of a missile "mated" with a live warhead . Series also included three high - altitude tests known as Operation Fishbowl, separated out in this text . </Td> </Tr> <Tr> <Th> Fishbowl </Th> <Td> 1962 </Td> <Td> 0009! 9 </Td> <Td> 0009! 9 </Td> <Td> 0004! 4 </Td> <Td> 0000! </Td> <Td> 0009! 9 </Td> <Td> 400 to 1,400 </Td> <Td> 2205! 2,205 </Td> <Td> The high altitude rocket part of Operation Dominic . Included several failed tests as the rockets failed for various reasons . </Td> </Tr> <Tr> <Th> Storax </Th> <Td> 1962--63 </Td> <Td> 0047! 47 </Td> <Td> 0047! 47 </Td> <Td> 0000! </Td> <Td> 0003! 3 </Td> <Td> 0001! 1 </Td> <Td> 1 to 115 </Td> <Td> 0585! 585 </Td> <Td> </Td> </Tr> <Tr> <Th> Roller Coaster </Th> <Td> 1963 </Td> <Td> 0004! 4 </Td> <Td> 0004! 4 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0004! 4 </Td> <Td> 0 </Td> <Td> 0000! 0 </Td> <Td> Storage - transportation safety experiments, measured plutonium dispersal risk . </Td> </Tr> <Tr> <Th> Niblick </Th> <Td> 1963--64 </Td> <Td> 0041! 41 </Td> <Td> 0043! 43 </Td> <Td> 0000! </Td> <Td> 0004! 4 </Td> <Td> 0000! </Td> <Td> small to 249 </Td> <Td> 0698! 698 </Td> <Td> </Td> </Tr> <Tr> <Th> Whetstone </Th> <Td> 1964--65 </Td> <Td> 0046! 46 </Td> <Td> 0049! 49 </Td> <Td> 0000! </Td> <Td> 0004! 4 </Td> <Td> 0001! 1 </Td> <Td> small to 51 </Td> <Td> 0476! 476 </Td> <Td> </Td> </Tr> <Tr> <Th> Flintlock </Th> <Td> 1965--66 </Td> <Td> 0047! 47 </Td> <Td> 0049! 49 </Td> <Td> 0000! </Td> <Td> 0002! 2 </Td> <Td> 0000! </Td> <Td> small to 365 </Td> <Td> 1891! 1,891 </Td> <Td> </Td> </Tr> <Tr> <Th> Latchkey </Th> <Td> 1966--67 </Td> <Td> 0038! 38 </Td> <Td> 0038! 38 </Td> <Td> 0000! </Td> <Td> 0003! 3 </Td> <Td> 0000! </Td> <Td> small to 870 </Td> <Td> 1831! 1,831 </Td> <Td> </Td> </Tr> <Tr> <Th> Crosstie </Th> <Td> 1967--68 </Td> <Td> 0048! 48 </Td> <Td> 0057! 57 </Td> <Td> 0005! 5 </Td> <Td> 0004! 4 </Td> <Td> 0002! 2 </Td> <Td> small to 1,300 </Td> <Td> 3638! 3,638 </Td> <Td> </Td> </Tr> <Tr> <Th> Bowline </Th> <Td> 1968--69 </Td> <Td> 0047! 47 </Td> <Td> 0058! 58 </Td> <Td> 0000! </Td> <Td> 0002! 2 </Td> <Td> 0001! 1 </Td> <Td> small to 1,150 </Td> <Td> 2152! 2,152 </Td> <Td> </Td> </Tr> <Tr> <Th> Mandrel </Th> <Td> 1969--70 </Td> <Td> 0052! 52 </Td> <Td> 0078! 78 </Td> <Td> 0001! 1 </Td> <Td> 0002! 2 </Td> <Td> 0000! </Td> <Td> small to 1,900 </Td> <Td> 5528! 5,528 </Td> <Td> </Td> </Tr> <Tr> <Th> Emery </Th> <Td> 1970--71 </Td> <Td> 0016! 16 </Td> <Td> 0024! 24 </Td> <Td> 0002! 2 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> small to 220 </Td> <Td> 0565! 565 </Td> <Td> </Td> </Tr> <Tr> <Th> Grommet </Th> <Td> 1971--72 </Td> <Td> 0034! 34 </Td> <Td> 0039! 39 </Td> <Td> 0000! </Td> <Td> 0001! 1 </Td> <Td> 0000! </Td> <Td> small to 4,800 </Td> <Td> 5200! 5,200 </Td> <Td> Included Cannikin, the largest underground explosion ever at 5 Mt, fired under the Aleutian island Amchitka . </Td> </Tr> <Tr> <Th> Toggle </Th> <Td> 1972--73 </Td> <Td> 0028! 28 </Td> <Td> 0035! 35 </Td> <Td> 0000! </Td> <Td> 0001! 1 </Td> <Td> 0000! </Td> <Td> small to 250 </Td> <Td> 0958! 958 </Td> <Td> </Td> </Tr> <Tr> <Th> Arbor </Th> <Td> 1973--74 </Td> <Td> 0018! 18 </Td> <Td> 0020! 20 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> small to 150 </Td> <Td> 0274! 274 </Td> <Td> </Td> </Tr> <Tr> <Th> Bedrock </Th> <Td> 1974--75 </Td> <Td> 0027! 27 </Td> <Td> 0029! 29 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> small to 750 </Td> <Td> 2840! 2,840 </Td> <Td> </Td> </Tr> <Tr> <Th> Anvil </Th> <Td> 1975--76 </Td> <Td> 0021! 21 </Td> <Td> 0021! 21 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0 to 1,000 </Td> <Td> 5993! 5,993 </Td> <Td> </Td> </Tr> <Tr> <Th> Fulcrum </Th> <Td> 1976--77 </Td> <Td> 0021! 21 </Td> <Td> 0024! 24 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> small to 140 </Td> <Td> 0635! 635 </Td> <Td> </Td> </Tr> <Tr> <Th> Cresset </Th> <Td> 1977--78 </Td> <Td> 0022! 22 </Td> <Td> 0023! 23 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0 to 150 </Td> <Td> 1122! 1,122 </Td> <Td> </Td> </Tr> <Tr> <Th> Quicksilver </Th> <Td> 1978--79 </Td> <Td> 0016! 16 </Td> <Td> 0016! 16 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 1 to 140 </Td> <Td> 0717! 717 </Td> <Td> </Td> </Tr> <Tr> <Th> Tinderbox </Th> <Td> 1979--80 </Td> <Td> 0014! 14 </Td> <Td> 0014! 14 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 1 to 140 </Td> <Td> 0452! 452 </Td> <Td> </Td> </Tr> <Tr> <Th> Guardian </Th> <Td> 1980--81 </Td> <Td> 0014! 14 </Td> <Td> 0014! 14 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 1 to 140 </Td> <Td> 0322! 322 </Td> <Td> </Td> </Tr> <Tr> <Th> Praetorian </Th> <Td> 1981--82 </Td> <Td> 0019! 19 </Td> <Td> 0020! 20 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 1 to 140 </Td> <Td> 0938! 938 </Td> <Td> </Td> </Tr> <Tr> <Th> Phalanx </Th> <Td> 1982--83 </Td> <Td> 0018! 18 </Td> <Td> 0019! 19 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 1 to 143 </Td> <Td> 0365! 365 </Td> <Td> </Td> </Tr> <Tr> <Th> Fusileer </Th> <Td> 1983--84 </Td> <Td> 0016! 16 </Td> <Td> 0016! 16 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> small to 150 </Td> <Td> 0521! 521 </Td> <Td> </Td> </Tr> <Tr> <Th> Grenadier </Th> <Td> 1984--85 </Td> <Td> 0016! 16 </Td> <Td> 0016! 16 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 3 to 150 </Td> <Td> 0670! 670 </Td> <Td> </Td> </Tr> <Tr> <Th> Charioteer </Th> <Td> 1985--86 </Td> <Td> 0016! 16 </Td> <Td> 0016! 16 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> small to 140 </Td> <Td> 0549! 549 </Td> <Td> </Td> </Tr> <Tr> <Th> Musketeer </Th> <Td> 1986--87 </Td> <Td> 0014! 14 </Td> <Td> 0016! 16 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 3 to 150 </Td> <Td> 0970! 970 </Td> <Td> </Td> </Tr> <Tr> <Th> Touchstone </Th> <Td> 1987--88 </Td> <Td> 0013! 13 </Td> <Td> 0015! 15 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 2 to 150 </Td> <Td> 0696! 696 </Td> <Td> </Td> </Tr> <Tr> <Th> Cornerstone </Th> <Td> 1988--89 </Td> <Td> 0011! 11 </Td> <Td> 0017! 17 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 1 to 150 </Td> <Td> 0436! 436 </Td> <Td> </Td> </Tr> <Tr> <Th> Aqueduct </Th> <Td> 1989--90 </Td> <Td> 0010! 10 </Td> <Td> 0013! 13 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> small to 150 </Td> <Td> 0426! 426 </Td> <Td> </Td> </Tr> <Tr> <Th> Sculpin </Th> <Td> 1990--91 </Td> <Td> 0007! 7 </Td> <Td> 0009! 9 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 2 to 140 </Td> <Td> 0478! 478 </Td> <Td> </Td> </Tr> <Tr> <Th> Julin </Th> <Td> 1991--92 </Td> <Td> 0007! 7 </Td> <Td> 0009! 9 </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> 0000! </Td> <Td> small to 100 </Td> <Td> 0172! 172 </Td> <Td> The last test series, cut off by the negotiation of the Comprehensive Test Ban Treaty . </Td> </Tr> <Tr> <Th> Totals </Th> <Td> 1945 - Jul - 16 to 1992 - Sep - 23 </Td> <Td> 1032 </Td> <Td> 1132 </Td> <Td> 12 </Td> <Td> 27 </Td> <Td> 231 </Td> <Td> 0 to 15,000 </Td> <Td> 196,514 </Td> <Td> Total country yield is 36.3% of all nuclear testing . </Td> </Tr> </Table>

Where have nuclear explosions occurred the most in the us