Editorial use only Workers monitoring lorries for radioactivity levels when they arrive carrying decontaminated waste that has been converted into concrete blocks, before going to the landfill site. The contaminated material is stored here for three years before undergoing high incineration and caesium removal to reduce radiation levels. The disaster, on 11th March 2011, was triggered after a magnitude 9.0 earthquake occurred 130 kilometres off the east coast of Japan causing a devastating tsunami. The tsunami damaged the Fukushima Daiichi nuclear power station, leading to the meltdown of three of the nuclear reactors and a leak of radioactive material. It was one of the world's largest nuclear incidents since the Chernobyl disaster of April 1986.