Home›1949 establishments in the Soviet Union›Semipalatinsk Deneme Alanı🌐TürkçeEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPortuguêsSvenskaTürkçeРусскийالعربيةفارسی中文日本語EntityQ757666· pop 37· linked from 181 articlesSemipalatinsk Deneme AlanıAlso known as Semipalatinsk-21, The Polygonnuclear test siteKey factsTypeNuclear test siteOperatorSoviet Union (1949–1989)StatusInactiveCoordinates50°07′N 78°43′E / 50.117°N 78.717°E / 50.117; 78.717Area18,000 km (6,950 sq mi)In use1949 – 1991Subcritical testsnot knownNuclear tests456 (340 underground and 116 aboveground)via Wikipedia infoboxWikidata factsImageRIAN archive 440215 Kurchatov city.jpgShow 1 more factCommons categorySemipalatinsk Test SiteOn the map2 mapped locationsAvailable in 37 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةConnectionsIrtyshEntitySemeyEntityCategories1949 establishments in the Soviet UnionAtomic tourismEast Kazakhstan RegionEnvironmental disasters in AsiaKazakh Soviet Socialist RepublicNuclear test sites in KazakhstanScience and technology in KazakhstanSoviet nuclear test sites