The map above simulates a 300-kiloton nuclear airburst over Lima, Peru — 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 11.2 million people — the rings above are drawn to real scale over their homes.
The marker is on the Plaza Mayor in the historic centre. The 1.9 km zone of total destruction covers the Government Palace, the cathedral, Congress, the Rímac bridge and the Chinatown market streets; the 4.7 km collapse ring reaches the Plaza San Martín, Breña, the Rímac district and the Cerro San Cristóbal's foot. Third-degree burns extend to about 7.5 km over Jesús María, La Victoria, Lince and the Estadio Nacional; the 14.5 km ring of broken windows reaches San Isidro's financial district, Miraflores, Callao's eastern edge, San Juan de Lurigancho and the airport.
Lima has about 11 million people, and the hillsides of San Juan de Lurigancho and Rímac inside the ring are covered with dense self-built housing. The Cerro San Cristóbal, 400 metres high and only 2 km from the marker, would shadow the valley behind it. Lima's permanent coastal fog would also absorb part of the thermal flash. Peru is part of the Latin American nuclear-weapon-free zone; see Nuclear arsenals.
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