Worldwide Nuclear Explosions
Worldwide Nuclear Explosions Xiaoping Yang, Robert North, and Carl Romney Science Applications International Corporation, Center for Monitoring Research, 1300 N. 17th Street, Arlington, VA 22209 Paul G. Richards Lamont-Doherty Earth Observatory, and Department of Earth and Environmental Sciences, Columbia University, Palisades, NY 10964 I. Introduction The first nuclear test, Trinity, exploded near Alamogordo, New Mexico, U.S.A., on 16 July 1945, marked the beginning of the nuclear explosive testing. Since then there is evidence that 2039 additional explosions have been conducted by seven countries (China, France, India, Pakistan, the Soviet Union, the United Kingdom, and the United States) during 1945-1998, according to information in the Nuclear Explosion Database at the Center for Monitoring Research (CMR) (Yang et al., 2000a; http://www.pidc.org). For completeness, the CMR database also includes the possible but disputed occurrence of an atmospheric nuclear explosion on 22 September 1979, with the "responsible country" listed as "Unknown”. This paper summarizes information on worldwide nuclear explosions extracted from the CMR database. 1 The CMR Nuclear Explosion Database contains comprehensive data relevant to nuclear monitor- ing research (e.g. origin time, location, and yield) on nuclear explosions worldwide. To ensure the completeness of information, data have been collected from a variety of sources, ranging from government announcements to media reports. The database has been maintained and updated on a regular basis as new data became available and as errors have been corrected. In general, an event in the database has several “origins” (data on location, time of occurrence, and confidence bounds). A preferred origin for any given event has been selected based on the most complete and accurate information on the coordinates and time of each explosion.
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