The map above simulates a 300-kiloton nuclear airburst over Tehran, Iran — 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 9.5 million people — the rings above are drawn to real scale over their homes.
The marker is in the city centre near Ferdowsi and Enghelab squares. The 1.9 km zone of total destruction covers the University of Tehran, the central bazaar's northern streets, the foreign ministry and the Golestan Palace; the 4.7 km collapse ring reaches the Grand Bazaar, Azadi Street's eastern half, Vali-e Asr's lower stretch and the main railway station. Third-degree burns extend to about 7.5 km over Mehrabad Airport's eastern end, Azadi Tower, the Nasr district and the southern bazaar neighbourhoods; the 14.5 km ring of broken windows reaches Vanak Square, Niavaran's approach, Tehranpars and the southern districts near Rey.
Tehran has about 9.5 million people and rises steeply from south to north; the northern districts face the burst from higher ground and would receive the thermal flash in full rather than being shadowed. The city sits on active faults and much of its older housing is unreinforced. Iran has no nuclear weapons; the 1.2-megaton B83 scenario shows the largest US bomb over the same point.
Language 
