Chernobyl Disaster: Key Facts on Nuclear Crisis Anniversary

The Chernobyl nuclear disaster, which took place on April 26, 1986, was caused by human error during a safety test that resulted in an explosion at reactor number four of the Chernobyl nuclear plant in northern Ukraine, then part of the Soviet Union. The explosion released a significant amount of radioactive material into the atmosphere, leading to widespread contamination across Ukraine, Belarus, and parts of Europe.

The International Atomic Energy Agency (IAEA) identified severe deficiencies in the reactor's design and violations of operational procedures as key factors in the disaster. An estimated 4,000 deaths were attributed to radiation exposure, with Greenpeace estimating the toll could be close to 100,000.

The area around Chernobyl, including the city of Pripyat, remains largely uninhabitable, with a 24,000-year timeline for safe living conditions. The site has become a nature reserve, with rare species like the Przewalski horse reintroduced.

The ongoing Russian military presence raises fears of further incidents at the site.