The Nuclear Testing Tally from ACA (Arms Control Association) ------------------------------------------------------------------------ Year United States USSR/Russia Britain France China India Pakistan Total ------------------------------------------------------------------------ 1945 1 1 ------------------------------------------------------------------------ 1998 0 0 0 0 0 2 2 4 ------------------------------------------------------------------------ Total 1,030 715 45 210 45 3 2 2,050 ------------------------------------------------------------------------ * CMR list has two explosions dropped in Japan in 1945 * CMR list has an Unknown event as a test * ACA list has 12 more test than CMR's for France In May, 1998, India conducted its first nuclear tests in 24 years, followed by Pakistan conducting its first tests ever. The tests-the first since the signing of the Comprehensive Test Ban Treaty (CTBT) in September 1996-present the most significant challenge to the nuclear non-proliferation regime in decades. In a May 11 press statement, India said it would be prepared 'to consider being an adherent to some of the undertakings' of the CTBT provided certain conditions were met. Pakistan has maintained it would be prepared to sign the CTBT if India does. United States (1,030) First tested: Jul. 16, 1945. Last tested: Sept. 23, 1992. Signed CTBT: Sept. 24, 1996. USSR/Russia (715 tests) First tested: Aug. 29, 1949. Last tested: Oct. 24, 1990. Signed CTBT: Sept. 24, 1996. Great Britain (45 tests) First tested: Oct. 3, 1952. Last tested: Nov. 26, 1991. Signed CTBT: Sept. 24, 1996. Deposited CTBT Ratification: Apr. 6, 1998. France (210 tests) First tested: Feb. 13, 1960. Last tested: Jan. 27, 1996. Signed CTBT: Sept. 24, 1996. Deposited CTBT Ratification: Apr. 6, 1998. China (45 tests) First tested: Oct. 16, 1964. Last tested: Jul. 29, 1996. Signed CTBT: Sept. 24, 1996. India (3 tests1) First tested: May 18, 1974. Subsequent tests May 11, 1998 and May 13, 1998. Not a CTBT signatory. Pakistan (2 tests1) First tested: May 28, 1998. Subsequent test May 30, 1998. Not a CTBT signatory. NOTE 1. In accordance with the definition of a nuclear test contained in the Threshold Test Ban Treaty and to allow accurate comparison with other countries' figures, India's three simultaneous nuclear explosions on May 11 are counted as only one nuclear test, as are the two explosions on May 13. Likewise, Pakistan's five simultaneous explosions on May 28 are counted as a single test.