This page shows a simulation of the B-83 (largest bomb in current US arsenal) (1.2 Mt) nuclear bomb (1200 kt) detonated over Tehran, Iran. The map displays the estimated fireball, the zones of heavy, moderate and light blast damage, thermal radiation and ionizing radiation. Click «What does that mean?» for a detailed legend, or run your own detonation on the main page.
A B83 over Tehran
A 1.2-megaton airburst over central Tehran, roughly over the Grand Bazaar and the old city. Tehran climbs the southern slopes of the Alborz mountains, rising about 700 metres from its southern to its northern districts, so the effect rings on this map fall on a tilted city. The 3 km zone of total destruction covers the bazaar, Golestan Palace, Tehran University and the government ministries; the 7.4 km collapse ring reaches Azadi Tower, Mehrabad Airport, Vanak Square and the dense southern districts.
Third-degree burns extend to about 13.5 km — to Tajrish and the foothills in the north and to Rey in the south — and the 1 psi ring, 23 km in radius, covers the whole city of nine million and its satellite towns. Because the northern districts sit on higher ground facing the burst, they would receive the thermal flash fully rather than being shadowed by it.
Iran has no nuclear weapons; the scenario exists because Tehran is one of the cities people most often look up in the simulator. For context on who does possess such weapons see Nuclear arsenals of the world, and for a more typical warhead size the 300-kiloton Tehran page.
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