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Note island of Elugelab on left. Enewetak Atoll, after Mike shot. Note crater on left. Elugelab, or Elugelap (Marshallese: Āllokļap, [ællʲoɡʷ(o)lˠɑpʲ] [1]), was an island, part of the Enewetak Atoll in the Marshall Islands. It was destroyed in the world's first full-scale thermonuclear explosion, the Mike shot of Operation Ivy, on ...
The test weapons produced a combined yield of about 77-78.6 Mt of TNT in explosive power. After the inhabitants agreed to a temporary evacuation, to allow nuclear testing on Bikini, which they were told was of great importance to humankind, [3] two nuclear weapons were detonated in 1946. About ten years later, additional tests with ...
Castle Bravo demonstrated the dangers of nuclear weapons. With a much higher yield than expected, it destroyed the island and produced greater fallout than anticipated. The United States detonated 23 nuclear devices between 1946 and 1958 at seven test sites on the reef, inside the atoll, in the air, and underwater. [22]
Operation Crossroads was a pair of nuclear weapon tests conducted by the United States at Bikini Atoll in mid-1946. They were the first nuclear weapon tests since Trinity on July 16, 1945, and the first detonations of nuclear devices since the atomic bombing of Nagasaki on August 9, 1945. The purpose of the tests was to investigate the effect ...
Runit Island (/ ˈ r uː n ɪ t /) is one of forty islands of the Enewetak Atoll of the Marshall Islands in the Pacific Ocean. The island is the site of a radioactive waste repository left by the United States after it conducted a series of nuclear tests on Enewetak Atoll between 1946 and 1958. There are ongoing concerns around deterioration of ...
A view of the "Sausage" device casing, with its instrumentation and cryogenic equipment attached. The long pipes were for measurement purposes; their function was to transmit the first radiation from the "primary" and "secondary" stages (known as "Teller light") to instruments just as the device was detonated, before being destroyed in the explosion.
The Shrimp device design later evolved into the Mark 21 nuclear bomb, of which 275 units were produced, weighing 17,600 pounds (8,000 kg) and measuring 12.5 feet (3.8 m) long and 58 inches (1.5 m) in diameter. This 18-megaton bomb was produced until July 1956. [59]
Johnston Island Launch Emplacement One (LE1) after a Thor missile launch failure and explosion contaminated the island with plutonium during the Operation "Bluegill Prime" nuclear test, July 1962 " Starfish ", a high altitude Thor launched nuclear test scheduled for June 20, 1962, was the first to contaminate the atoll.