This page shows a simulation of the 100000 kt nuclear bomb (100000 kt) detonated over New Delhi, India. 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.
100 megatons was the design yield of the Soviet AN602 — the Tsar Bomba — before its final stage was throttled back to 50 for the 1961 test. No weapon of this size was ever deployed: the bomb weighed 27 tonnes, no missile could lift it, and the arms race moved towards many smaller warheads instead. This scenario is therefore a physical ceiling, not a military one. The rings are enormous: a fireball about 12 km across, total destruction (20 psi) to roughly 13 km, collapse of houses (5 psi) to about 32 km, third-degree burns on exposed skin to about 75 km in clear weather, and broken windows (1 psi) out to about 100 km.
What that means in New Delhi
Centred on Connaught Place, the 13 km zone of total destruction covers Lutyens' Delhi, Old Delhi, South Delhi, the airport and the Yamuna's eastern bank. The 32 km collapse ring takes in the entire National Capital Territory plus Gurugram, Noida, Ghaziabad and Faridabad — somewhere around 30 million people, the largest number in any scenario on this site. Burns to 75 km reach Meerut, Sonipat, Greater Noida, Rohtak, Palwal and Bulandshahr; the 100 km ring of broken windows covers the whole National Capital Region out to Panipat and Hapur. The Yamuna plain is perfectly flat. The 300-kiloton page shows a typical warhead over the same city.