Nevada Test Site Office. These four counties measured maximum levels higher than 6,000 microcuries per square meter (220 MBq/m2).. Crater created by underground nuclear blast. This site can be found in Nevada Test Site in Nye County. , The Sedan shot resulted in a radioactive cloud that separated into two plumes, rising to 3.0 km and 4.9 km (10,000 ft and 16,000 ft). Reference Location: Sedan Crater. The explosion created fallout that affected more US residents than any other nuclear test, exposing more than 13 million people to radiation. Within days of the error, the international community took notice. http://bbs.keyhole.com/ubb/showflat.php/Cat/0/Number/8092/an//page//vc/1 Center for Digital Discourse and Culture, Virginia Tech. The crater was listed on the National Register of Historic Places on March 21, 1994. Assessment of the full effects of the Sedan shot showed that the radioactive fallout from such uses would be extensive. The two plumes headed northeast and then east in roughly parallel paths towards the Atlantic Ocean. The 1,280 by 320 ft (390 by 100 m) crater was created on July 6, 1962 by a 104-kiloton-of-TNT (440 TJ) thermonuclear explosion. , Russian thistle, also known as tumbleweed, is the primary plant species growing in the crater along with some grasses.  Within 7 months of the excavation, the bottom of the crater could be safely walked upon with no protective clothing and photographs were taken.  Over 10,000 people per year visit the crater through free monthly tours offered by the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office. 0. Library. Sudanese officials responded by stating that "the Sudanese government takes this issue seriously and with extreme importance". Erstklassige Nachrichtenbilder in hoher Auflösung bei Getty Images Sedan Crater is the largest ground depression resulting from a nuclear detonation in the United States. However, the name "Sedan" was incorrectly transcribed as "Sudan" in the Congressional Record.  Detected radioactivity was especially high in eight counties in Iowa and one county each in Nebraska, South Dakota and Illinois. The crater is the result of the displacement of 12,000,000 short tons (11,000,000 t) of earth. The crater was listed on the National Register of Historic Places on March 21, 1994..  The device was buried 635 feet (194 m) below the desert floor in Area 10 of Yucca Flat and was the largest cratering shot in the Plowshare Program. , Coordinates: 37°10′37″N 116°2′46″W / 37.17694°N 116.04611°W / 37.17694; -116.04611, Shot Bluestone and Swanee of operation Dominic, United States Department of Health and Human Services, Centers for Disease Control and Prevention, Nuclear Explosions for the National Economy, "NTS 50th Anniversary Newsletter—Sedan Tested Use of Nuclear Explosives to Move Earth", "Operation Storax, Sun Beam, and Roller Coaster", "Possibilities for peaceful nuclear explosions.  No such nuclear excavation has since been undertaken by the United States, though the Soviet Union continued to pursue the concept through their program Nuclear Explosions for the National Economy, particularly with their 140 kiloton Chagan (nuclear test), which created an artificial lake reservoir (see Lake Chagan). , Had this test been conducted after 1965 when improvements in device design were realized, a 100-fold reduction in radiation release is considered feasible..  While Sedan ranks highest in percentages of Au-198 detected, it is not the most prolific generator or gold-heavy design that was tested by the US, due to the explosion being far more well contained, a larger quantity, referred to as a "a goldmine" of (Au) was used extensively in the W71 warhead, that was proof-tested in 1971 within a deep borehole in the Amchitka islands off Alaska. Area: 45.2 mile - 72.7 km radius. Proposed applications included the creation of harbors, canals, open pit mines, railroad and highway cuts through mountainous terrain and the construction of dams. The Sedan Crater, in the Nevada Test Site, is believed to be the largest nuclear bomb crater. Home to what was once known as the Nevada Test Site, it was here that scientists conducted below-ground nuclear tests from 1951 until 1992. , U.S. National Register of Historic Places, "Photos – Underground Nuclear Testing – Nevada Test Site", "Possibilities for peaceful nuclear explosions. Sedan Crater is the result of the Sedan nuclear test and is located within the Nevada Test Site, 12 miles southwest of Groom Lake, Nevada. Sedan Crater is the result of the Sedan nuclear test and is located within the Nevada Test Site, southwest of Groom Lake, Nevada (Area 51). http://bbs.keyhole.com/ubb/showflat.php/Cat/0/Number/8092/an//page//vc/1 Sedan Crater is actually the site formed by detonated thermonuclear device happening back is 1962.  Its closest Soviet counterpart is the slightly wider Chagan crater which filled in to create Lake Chagan. | Location: Mercury, Nevada, USA. Sedan ranked third in the detected amount of 24Na in fallout. National Institute of Health. Storax Sedan was a shallow underground nuclear test conducted in Area 10 of Yucca Flat at the Nevada National Security Site on July 6, 1962, as part of Operation Plowshare, a program to investigate the use of nuclear weapons for mining, cratering, and other civilian purposes. The crater was listed on the National Register of Historic Places on March 21, 1994.The crater is the result of the displacement of 12,000,000 short tons of earth. The crater is a man-made object that can be seen from earth orbit with the unaided eye. It is the first nuclear missile system test location for the nation. The crater is the result of the displacement of of earth. Sedan Crater (Google Maps). The Plowshare project developed the Sedan test in order to determine the feasibility of using nuclear detonations to quickly and economically excavate large amounts of earth and rock.