https://avoimenkoodinmaailma.blogspot.com/ Kimmo Huosionmaa In 1962 United States conducted one of the first underground nuclear tests in history and the name of this test was "Storax Sedan". There was one underground test before that, and it was codenamed "Plumbbob Rainier", and it was a 1,7 kiloton nuclear detonation, what mission was to test the systems for underground nuclear tests, what was only allowed a way to test nuclear detonations after 1963, and the nuclear test prohibiting treaty, what prohibited atmospheric, undersea and orbital nuclear tests. Underground tests were allowed because the development of nuclear explosives wanted to allow for scientific and civilian purposes like mining operations and making artificial rivers. The mission of "Sedan" was to demonstrate high yield underground nuclear detonations and this 104 kiloton device made the crater in the Nevada Test site, what is the national monument. "Sedan" caused very l...