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created: 2025-10-27T09:17:57.483Z
---# Nagasaki

**URL:** [https://en.wikipedia.org/wiki/Atomic_bombings_of_Hiroshima_and_Nagasaki](https://en.wikipedia.org/wiki/Atomic_bombings_of_Hiroshima_and_Nagasaki)

Nagasaki Date & Time: August 9, 1945, at 11:02 a.m. local time Type of Bomb: Plutonium-239 implosion-type fission bomb nicknamed "Fat Man" Mechanism: Used conventional explosives to symmetrically compress a plutonium core into a supercritical state, initiating a nuclear chain reaction. Detonation Altitude: About 500 meters (1,650 feet) above the Urakami Valley.


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**Keywords:** public
