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Lake Chagan (Kazakh: Шаған, Shaǵan) or Lake Balapan, Kazakhstan, is a lake created by the Chagan nuclear test fired on January 15, 1965, part of the Nuclear Explosions for the National Economy. A 140 kiloton device was placed in a 178-metre (584 ft) deep hole in the dry bed of the Chagan River. The blast created a crater 400 m (1,300 ft) across and 100 m (330 ft) deep with a lip height of 20 to 38 m (66 to 125 ft).; it is often referred to as "Atomic Lake".
|Water volume||10,000,000 m3 (8,100 acre⋅ft)|
The lake's water comes from the Chagan River (tributary of Irtysh River). The crater lake's volume is approximately 10,000,000 m3 (350,000,000 cu ft). To the south, the rim of the crater holds back the waters of a second reservoir.
- "On the Soviet program for peaceful uses of nuclear weapons" (pdf). Lawrence Livermore National Laboratory.
- "On the Soviet nuclear program". Nuclear Weapon Archive.
- Ayuniv, D. E. (2017). "Present thermal regime of Lake Atomic (Semipalatinsk test site)". Russian Geology and Geophysics. 58 (7): 864-867. doi:10.1016/j.rgg.2017.06.009. Retrieved 17 March 2019.
- "A documentary that visits the lake at around the 1 minute mark" (video). YouTube. Russia Today.
- "Lake Chagan map" – via Google Maps.
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