sovtime:

26 апреля 1986 года произошла авария на Чернобыльской АЭС. Украинская ССР, СССР.

Chernobyl disaster occurred on 26 April 1986 at the Chernobyl Nuclear Power Plant in the Ukrainian SSR, USSR.

The Elephant’s Foot is the nickname given to a large mass of corium and other materials formed underneath the Chernobyl Nuclear Power Plant, near Pripyat, Ukraine, during the Chernobyl disaster of April 1986. It remains an extremely radioactive object; however, its danger has decreased over time due to the decay of its radioactive components.