Trinity was the code name of the first detonation of a nuclear weapon. It was conducted by the United States Army at 5:29 a.m. on July 16, 1945, as part of the Manhattan Project. The test was conducted in the Jornada del Muerto desert about 35 miles (56 km) southeast of Socorro, New Mexico, on what was then the USAAF Alamogordo Bombing and Gunnery Range, now part of White Sands Missile Range. The only structures originally in the vicinity were the McDonald Ranch House and its ancillary buildings, which scientists used as a laboratory for testing bomb components. A base camp was constructed, and there were 425 people present on the weekend of the test.

Trinity
Trinity Detonation T&B.jpg
Mushroom cloud seconds after detonation of the Gadget.
Information
Country
United States
Test site
Trinity Site, New Mexico
Date
July 16, 1945
(76 years ago)
Test type
Atmospheric
Device type
Plutonium implosion fission
Yield
25 kilotons of TNT (100 TJ)