The map above simulates a 300-kiloton nuclear airburst over Istanbul, Turkey — 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 15.6 million people — the rings above are drawn to real scale over their homes.
The marker is in Fatih, on the historic peninsula between Sultanahmet and the Grand Bazaar. The 1.9 km zone of total destruction covers Hagia Sophia, the Blue Mosque, Topkapı Palace, the Grand Bazaar and Beyazıt Square; the 4.7 km collapse ring reaches the Golden Horn, Eminönü, Galata and Karaköy across the water, and the Theodosian walls' inner districts. Third-degree burns extend to about 7.5 km over Taksim, Beyoğlu, Beşiktaş and, across the Bosphorus, Üsküdar and Kadıköy; the 14.5 km ring of broken windows reaches Levent's towers, Bakırköy, Eyüp and Ataşehir.
Istanbul's 15–16 million people live on two continents, and the water of the Bosphorus and the Golden Horn absorbs a noticeable part of the blast; the hills on the Asian side and along the Bosphorus would cast real terrain shadows. Turkey hosts US nuclear bombs at İncirlik under NATO sharing but has none of its own. See Nuclear arsenals.
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