The map above simulates a 300-kiloton nuclear airburst over Madrid, Spain — roughly the size of a modern deployed warhead. The coloured rings show the estimated fireball, the zones of heavy, moderate and light blast damage, the reach of the thermal flash and the ionizing-radiation dose. Drag the marker or change the weapon in the full simulator to explore other scenarios.
The metropolitan area is home to about 6.7 million people — the rings above are drawn to real scale over their homes.
The marker is on the Puerta del Sol. The 1.9 km zone of total destruction covers the Plaza Mayor, the Royal Palace, Gran Vía, the Prado and the Cortes; the 4.7 km collapse ring reaches Atocha station, the Retiro Park, Malasaña, Chamberí and the Príncipe Pío area. Third-degree burns extend to about 7.5 km over Chamartín's southern districts, Salamanca, Lavapiés, Arganzuela and the Casa de Campo's edge; the 14.5 km ring of broken windows reaches the Bernabéu stadium, Vallecas, Ciudad Universitaria, Carabanchel and the M-30 ring road on all sides.
Greater Madrid has about 6.7 million inhabitants, and the city inside the M-30 is a dense fabric of six- to eight-storey blocks that would collapse readily at 5 psi. Madrid sits on a plateau at 650 metres with no significant relief. Spain has no nuclear weapons; in 1966 a US bomber crash scattered four hydrogen bombs over Palomares in Almería without a nuclear explosion. See Nuclear arsenals.
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