The map above simulates a 300-kiloton nuclear airburst over Buenos Aires, Argentina — 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 15.5 million people — the rings above are drawn to real scale over their homes.
The marker is on the Obelisco at the junction of Corrientes and 9 de Julio. The 1.9 km zone of total destruction covers the Microcentro, the Casa Rosada, Plaza de Mayo, Retiro station and the Teatro Colón; the 4.7 km collapse ring reaches San Telmo, Puerto Madero, Recoleta, Congreso and Once. Third-degree burns extend to about 7.5 km over Palermo, La Boca, Almagro, Barracas and the Buenos Aires port; the 14.5 km ring of broken windows reaches Belgrano, Caballito, Flores, Avellaneda across the Riachuelo and Jorge Newbery airport.
About 15 million people live in Greater Buenos Aires, and the central districts are dense mid-rise blocks on a perfectly flat pampa. The Río de la Plata to the east takes about a third of each ring. Argentina had an active weapons programme in the 1970s and 80s, abandoned it, and is now a member of the Latin American nuclear-weapon-free zone — see Nuclear arsenals.
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