Zurich city centre sits 0 m from Zurich financial centre, the most plausible strategic target in the area (low targeting confidence). Modelled strike: 150 kt airburst.
Estimated survival chance at city centre: 0% · Estimated metro fatalities: 33.7K, injuries: 40.6K
What a strike on Zurich financial centre would mean
A 150 kt detonation produces a fireball 490 m across in radius. Reinforced concrete fails out to 1.8 km (20 psi). Most residential buildings collapse within 3.7 km (5 psi), and windows shatter dangerously out to 8.2 km (1 psi). Anyone in line of sight within 5.2 km suffers third-degree burns from the thermal pulse.
An airburst maximises blast damage but produces minimal local fallout, so for Zurich the dominant risks are blast and thermal effects rather than radiation.
Most plausible targets near Zurich
| Target | Type | Distance | Assumed yield | Confidence |
|---|---|---|---|---|
| Zurich financial centre | city | 0 km | 150 kt | low |
| Ramstein Air Base | military | 239 km | 300 kt | high |
| Ghedi Air Base, Italy (B61) | military | 253 km | 300 kt | high |
| Büchel Air Base, Germany (B61) | military | 329 km | 300 kt | high |
| Milan industrial belt | industrial | 218 km | 150 kt | low |
Key blast radii (150 kt airburst)
| Effect | Radius | What happens |
|---|---|---|
| Fireball | 490 m | Complete vaporisation |
| 20 psi blast | 1.8 km | Hardened structures destroyed, ~100% fatalities |
| 5 psi blast | 3.7 km | Most buildings collapse, widespread fatalities |
| 3rd-degree burns | 5.2 km | Full-thickness burns to exposed skin |
| 500 rem radiation | 2.1 km | Lethal dose without medical care |
| 1 psi blast | 8.2 km | Window breakage, light damage, glass injuries |
How Zurich can prepare
With a population density of 4,700 people/km², Zurich's outcome would hinge on the first hour. The guidance is identical everywhere: get inside, stay inside, stay tuned. A basement or the core of a large concrete building cuts fallout exposure by a factor of 10 or more, and radiation decays fast — dose rates fall ~90% within the first 7 hours and ~99% within two days.
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