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Operation Fishbowl was a series of high-altitude nuclear tests in 1962 that were carried out by the United States as a part of the larger Operation Dominic nuclear test program. Flight-test vehicles were designed and manufactured by Avco Corporation. The Kingfish detonation occurred at 0210 (Johnston Island time) on November 1, 1962 and was the fourth successful detonation of the Fishbowl series. It was officially reported only as being a submegaton explosion, but most independent observers believe that it used the same 400 kiloton warhead as the Bluegill Triple Prime test, although one report by the U.S. federal government reported the test yield as 200 kilotons. According to the official report, at the time of the Kingfish detonation, Johnston Island observers saw a yellow-white, luminous circle with intense purple streamers for the first minute. Some of the streamers displayed what appeared to be a rapid twisting motion at times. A large pale-green patch appeared somewhat south of the burst and grew, becoming the dominant visible feature after 5 minutes. By H+1 the green had become dull gray, but the feature persisted for 3 hours. At Oahu a bright flash was observed and after about 10 seconds a great white ball appeared to rise slowly out of the sea and was visible for about 9 minutes.
