Operation Anvil | |
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Information | |
Country | United States |
Test site |
|
Period | 1975–1976 |
Number of tests | 21 |
Test type | underground shaft, tunnel |
Max. yield | 1 megatonne of TNT (4.2 PJ) |
Test series chronology | |
Operation Anvil [1] was a series of 21 nuclear tests conducted by the United States in 1975–1976 at the Nevada Test Site. These tests followed the Operation Bedrock series and preceded the Operation Fulcrum series.
Name [note 1] | Date time (UT) | Local time zone [note 2] [2] | Location [note 3] | Elevation + height [note 4] | Delivery [note 5] Purpose [note 6] | Device [note 7] | Yield [note 8] | Fallout [note 9] | References | Notes |
---|---|---|---|---|---|---|---|---|---|---|
Marsh | September 6, 1975 17:00:00.113 | PST (–8 hrs) | NTS Area U3kb 37°01′25″N116°01′45″W / 37.02362°N 116.02909°W | 1,187 m (3,894 ft) – 427.21 m (1,401.6 ft) | underground shaft, weapons development | 7 kt | [1] [3] [4] [5] [6] | |||
Peninsula (aborted) | October 23, 1975 | PST (–8 hrs) | NTS Area near U2em | 1,220 m (4,000 ft) + | underground shaft, | no yield | Became stuck in shaft while being lowered; abandoned, later destroyed by Tinderbox/Azul. | |||
Husky Pup | October 24, 1975 17:11:26.093 | PST (–8 hrs) | NTS Area U12t.03 37°13′18″N116°10′49″W / 37.22174°N 116.18019°W | 2,036 m (6,680 ft) – 327.96 m (1,076.0 ft) | tunnel, weapon effect | 15 kt | [1] [3] [5] [6] [7] | |||
Kasseri | October 28, 1975 14:30:00.16 | PST (–8 hrs) | NTS Area U20z 37°17′24″N116°24′45″W / 37.29°N 116.41244°W | 1,957 m (6,421 ft) – 1,264.92 m (4,150.0 ft) | underground shaft, weapons development | B77 | 1 Mt | Venting detected | [1] [5] [6] [7] [8] [9] | Full yield test of the B77/B83 [10] |
Deck | November 18, 1975 15:30:00.113 | PST (–8 hrs) | NTS Area U3kd 37°01′13″N116°01′17″W / 37.02031°N 116.02143°W | 1,185 m (3,888 ft) – 326.14 m (1,070.0 ft) | underground shaft, weapons development | 5 kt | [1] [5] [6] | |||
Inlet | November 20, 1975 15:00:00.093 | PST (–8 hrs) | NTS Area U19f 37°13′30″N116°22′06″W / 37.2249°N 116.36845°W | 2,025 m (6,644 ft) – 818.33 m (2,684.8 ft) | underground shaft, weapons development | W78 | 500 kt | [1] [3] [5] [6] [7] [9] | ||
Leyden | November 26, 1975 15:30:00.163 | PST (–8 hrs) | NTS Area U9cm 37°07′02″N116°01′11″W / 37.11721°N 116.01975°W | 1,303 m (4,275 ft) – 326.11 m (1,069.9 ft) | underground shaft, weapons development | 5 kt | [1] [3] [5] [6] [7] | |||
Chiberta | December 20, 1975 20:00:00.164 | PST (–8 hrs) | NTS Area U2ek 37°07′39″N116°03′45″W / 37.1276°N 116.06244°W | 1,264 m (4,147 ft) – 716 m (2,349 ft) | underground shaft, weapons development | B77 | 160 kt | [1] [3] [4] [5] [6] [9] | ||
Muenster | January 3, 1976 19:15:00.162 | PST (–8 hrs) | NTS Area U19e 37°17′47″N116°20′03″W / 37.2965°N 116.33407°W | 2,082 m (6,831 ft) – 1,452.4 m (4,765 ft) | underground shaft, weapons development | (reduced yield?) | 800 kt | [1] [3] [5] [6] [7] | B77 Components Tested [11] | |
Keelson | February 4, 1976 14:20:00.112 | PST (–8 hrs) | NTS Area U7ai 37°04′09″N116°01′52″W / 37.06921°N 116.03103°W | 1,218 m (3,996 ft) – 639.62 m (2,098.5 ft) | underground shaft, weapons development | W76 | 150 kt | [1] [3] [4] [5] [6] [9] | ||
Esrom | February 4, 1976 14:40:00.163 | PST (–8 hrs) | NTS Area U7ak 37°06′24″N116°02′18″W / 37.10655°N 116.03829°W | 1,258 m (4,127 ft) – 654.6 m (2,148 ft) | underground shaft, weapons development | B77 | 160 kt | Venting detected, 88 Ci (3,300 GBq) | [1] [3] [5] [6] [8] [12] [9] | |
Fontina | February 12, 1976 14:45:00.163 | PST (–8 hrs) | NTS Area U20f 37°16′17″N116°29′22″W / 37.27136°N 116.48934°W | 1,837 m (6,027 ft) – 1,219 m (3,999 ft) | underground shaft, weapons development | 900 kt | [1] [3] [5] [6] [7] | |||
Cheshire | February 14, 1976 11:30:00.162 | PST (–8 hrs) | NTS Area U20n 37°14′33″N116°25′16″W / 37.242611°N 116.42113°W | 1,947 m (6,388 ft) – 1,167 m (3,829 ft) | underground shaft, weapons development | B77 | 350 kt | [1] [3] [5] [6] [7] [9] | See Whetstone/Cambric. A test of groundwater mobility in moving buried radiaoactives, this time in volcanic rock/soil. | |
Shallows | February 26, 1976 14:50:00.091 | PST (–8 hrs) | NTS Area U3jf 37°01′43″N116°00′59″W / 37.02851°N 116.01649°W | 1,188 m (3,898 ft) – 244.85 m (803.3 ft) | underground shaft, weapons development | W78 primary? | 2.5 kt | Venting detected | [1] [4] [5] [6] [8] [9] | |
Estuary | March 9, 1976 14:00:00.094 | PST (–8 hrs) | NTS Area U19g 37°18′34″N116°21′56″W / 37.30955°N 116.36549°W | 2,025 m (6,644 ft) – 856.79 m (2,811.0 ft) | underground shaft, weapons development | W78 | 350 kt | [1] [3] [5] [6] [7] [9] | ||
Colby | March 14, 1976 12:30:00.163 | PST (–8 hrs) | NTS Area U20aa 37°18′21″N116°28′21″W / 37.30594°N 116.47237°W | 1,904 m (6,247 ft) – 1,273.4 m (4,178 ft) | underground shaft, weapons development | B77 | 800 kt | Venting detected, 44 Ci (1,600 GBq) | [1] [5] [6] [7] [8] [9] | |
Pool | March 17, 1976 14:15:00.09 | PST (–8 hrs) | NTS Area U19p 37°15′21″N116°19′46″W / 37.25584°N 116.32946°W | 2,076 m (6,811 ft) – 881.18 m (2,891.0 ft) | underground shaft, weapons development | W78 | 500 kt | [1] [3] [5] [6] [7] [9] | ||
Strait | March 17, 1976 14:45:00.091 | PST (–8 hrs) | NTS Area U4a 37°06′26″N116°03′16″W / 37.10716°N 116.05432°W | 1,243 m (4,078 ft) – 782.42 m (2,567.0 ft) | underground shaft, weapons development | 210 kt | [1] [3] [4] [5] [6] | |||
Mighty Epic | May 12, 1976 19:50:00.17 | PST (–8 hrs) | NTS Area U12n.10 37°12′32″N116°12′48″W / 37.20901°N 116.21333°W | 2,224 m (7,297 ft) – 396.24 m (1,300.0 ft) | tunnel, weapon effect | 20 kt | [1] [5] [6] | |||
Rivoli | May 20, 1976 17:30:00.162 | PST (–8 hrs) | NTS Area U2eg 37°08′14″N116°04′03″W / 37.13715°N 116.06745°W | 1,279 m (4,196 ft) – 199.64 m (655.0 ft) | underground shaft, weapons development | W79 | 600 t | Venting detected | [1] [5] [6] [7] [8] [9] | |
Billet | July 27, 1976 20:30:00.079 | PST (–8 hrs) | NTS Area U7an 37°04′31″N116°02′40″W / 37.07537°N 116.04456°W | 1,222 m (4,009 ft) – 636.57 m (2,088.5 ft) | underground shaft, weapons development | B61 | 58 kt | I-131 venting detected, 0 | [1] [3] [5] [6] [8] [12] [9] |
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