NUCLEAR TEST DETONATIONS OFFICIALLY ANNOUNCED BY THE UNITED STATES, THE UNITED KINGDOM, AND THE USRR Compiled through April 16, “1957 U. S. Detonations Number Cumulative Trinity, New Mexico, July 16, 1945 Crossroads, Bikini Atoll, July 1946 Sandstone, Eniwetok Proving Ground, April 1948 Ranger, Nevada Test Site, January & February, 1951 Greenhouse, EPG, April & May, 1951 Buster-Jangle, NTS, October & November, 1951 Tumbler-Snapper, NTS, April, May & June, 1952 Ivy, EPG, November 1952 Upshot-Knothole, NTS, March, April, May & June, 1953 Castle, EPG, March, April & May, 1954 Teapot, NTS, February, March, April & May, 1955 Wigwam, Pacific Ocean, May 1955 Redwing, EPG, May, June & July, 1956 1 2 3 5 4 7 1 3 6 i 15 22 8 30 2 32 3 14 1 3 46 60 61 64 11 43 USSR_Detonations (As announced by the U. S. Government and/or the USSR) 1949: 1951: 1953: September 23, October 3, October 22, August 12 (thermonuclear), August 23 (part of series). 1954: 1955: October 26 (part of series). Aug. 4, Sept. 24 (part of series), Nov. 10 (part of series), 1956: March 21, April 2 (part of series), Aug. 24 (part of series), Aug. 30 (part of series), Sept. 2 (part of series), Sept. 10 Nov. 23 ("largest thus far... in megaton range"). (announced by USSR), Nov. 17 (announced same day by U. S. and 1957: USSR). Jan. 20 (part of series), March &, April 3 (part of series), April 6, April 10 (part of series), April 12 (part of series), April 16. United Kingdom October 3 (Montebello Islands). October 15, October 26 (both at Woomera). May 16, June 19 (both at Montebello Islands), Sept. 27, Oct. 4, Oct. 11, Oct. 22 (last four shots, all at Maralinga, constitute x ; fpr, Cr Ly ois a QE 3 WIN fourth British series). ~ 1952: 1953: 1956: