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Moruroa nuclear blast radius
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Moruroa hosted French nuclear tests from the 1960s to 1996. This page uses the B83’s 1.2 Mt as a large-but-named analog, not a specific French shot.
Open Moruroa in the 3D simulator
Educational estimate only. Blast and heat rings use simplified yield scaling. They ignore terrain, weather, shielding, and weapon design. Casualty counts use WorldPop 2020 residents on an approximately 1 km grid and ignore time of day, commuting, shelter, and evacuation. This is not a targeting or civil-defense tool. About the model.
| Effect | Ground range | What the model means |
|---|---|---|
| Fireball | 1.5 km (5,034 ft) | Maximum luminous radius |
| 20 psi | 3.6 km (2.2 mi) | Heavy destruction |
| 5 psi | 7.8 km (4.9 mi) | Most buildings collapse |
| Thermal | 12.3 km (7.7 mi) | 3rd-degree burns |
| 1 psi | 18.1 km (11.2 mi) | Windows shatter |
Casualty estimate at this pin
| Estimated deaths | 83 |
|---|---|
| Estimated injuries | 117 |
| Residents inside 1 psi | 283 |
What the rings cover
A 1.2 Mt disk covers the atoll and a wide ocean radius in the model. WorldPop inside the rings is near zero. The educational point is yield-versus-atoll scale, not a 2020 death total.
Canopus (1968) was a multi-megaton French thermonuclear test; this globe does not carry that exact yield as a preset. B83 is the largest named US bomb still listed here in the megaton-plus class that stays on the free weapon list.
Pacific test history includes displacement and later contamination claims. The simulator’s fallout overlay is not a French health study.
Read with Bikini and Enewetak: atoll test sites where megaton disks meet almost empty 2020 population cells.
Related pages
Bikini Atoll · Enewetak Atoll · B83 · Castle Bravo
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