Britannica Sources used in this answer

At what altitude did Fat Man explode over Nagasaki?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Atomic bombing of Hiroshima — atomic bombings of Hiroshima and Nagasaki A gigantic mushroom cloud rising above Hiroshima, Japan, on August 6, 1945, after a U.S. aircraft dropped an atomic bomb on the city, immediately killing more than 70,000 people.

The Fat Man atomic bomb exploded over Nagasaki at an altitude of 500 meters (1,650 feet).123