This page shows a simulation of the 100000 kt nuclear bomb (100000 kt) detonated over Moscow, Russia. 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 Moscow
Centred on the Kremlin, the 13 km zone of total destruction covers everything inside the Moscow Central Circle and most of the city up to the MKAD. The 32 km collapse ring takes in all of Moscow and the first belt of satellite towns — Khimki, Mytishchi, Balashikha, Lyubertsy, Odintsovo, Zelenograd's edge — around 17 million people. Burns reach 75 km: Podolsk, Domodedovo and Sheremetyevo airports, Zvenigorod, Noginsk, Sergiev Posad. The 100 km ring of broken glass extends to Klin, Serpukhov, Kolomna and Mozhaysk — practically the whole of Moscow Oblast. The 1.2-megaton B83 scenario over the same point shows how much smaller a real weapon's footprint is.
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