Most of you probably know what happened here on the above date and time. At about 1,640 feet (500 meters) above the Hypocenter Park, Fat Man exploded, with a power of 20 kilotons, generating heat of 7,050 °F (3,900 °C) and winds estimated at 624 mph (1,005 km/h).
Estimates of the dead vary widely. A couple of sources mention 70,000 killed instantly with another 70,000 dying of radiation sickness. Another source says around 70,000 were killed in total. In any case, these are large numbers for a bomb that missed its target by 1.9 miles (3 kilometers) and the blast of which was confined to the narrow Urakami Valley. The Mitsubishi Arms Plant and the Mitsubishi Steel Works were heavily damaged.
Nagasaki Hypocenter Park
Return to Japan