Nagasaki topographic map
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Nagasaki
On the day of the nuclear strike (August 9, 1945) the population in Nagasaki was estimated to be 263,000, which consisted of 240,000 Japanese residents, 10,000 Korean residents, 2,500 conscripted Korean workers, 9,000 Japanese soldiers, 600 conscripted Chinese workers, and 400 Allied POWs. That day, the Boeing B-29 Superfortress Bockscar, commanded by Major Charles Sweeney, departed from Tinian's North Field just before dawn, this time carrying a plutonium bomb, code named "Fat Man". The primary target for the bomb was Kokura, with the secondary target being Nagasaki, if the primary target was too cloudy to make a visual sighting. When the plane reached Kokura at 9:44 a.m. (10:44 am. Tinian Time), the city was obscured by clouds and smoke, as the nearby city of Yahata had been firebombed on the previous day – the steel plant in Yahata had also instructed their workforce to intentionally set fire to containers of coal tar, to produce target-obscuring black smoke. Unable to make a bombing attack 'on visual' because of the clouds and smoke, and with limited fuel, the plane left the city at 10:30 a.m. for the secondary target. After 20 minutes, the plane arrived at 10:50 a.m. over Nagasaki, but the city was also concealed by clouds. Desperately short of fuel and after making a couple of bombing runs without obtaining any visual target, the crew was forced to use radar to drop the bomb. At the last minute, the opening of the clouds allowed them to make visual contact with a racetrack in Nagasaki, and they dropped the bomb on the city's Urakami Valley midway between the Mitsubishi Steel and Arms Works in the south, and the Mitsubishi-Urakami Ordnance Works in the north. The bomb exploded 53 seconds after its release, at 11:02 a.m. at an approximate altitude of 1,800 feet.
About this map
Name: Nagasaki topographic map, elevation, terrain.
Location: Nagasaki, Nagasaki Prefecture, 850-8685, Japan (32.17990 129.31848 32.96858 130.02994)
Average elevation: 44 m
Minimum elevation: -4 m
Maximum elevation: 1,417 m
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