Hiroshima & Nagasaki nuclear explosions

Hiroshima & Nagasaki nuclear explosions – Atomic bombs are based on the principle of nuclear fission, which was discovered in Nazi Germany in 1938 by two radio chemists. During the process, atoms are split and energy is released in the form of heat. Controlled reactions are applied in nuclear power plants for production of electricity, whereas unchecked reactions occur during nuclear bombings. The invention in Germany alarmed people in the United States, because the Nazi’s in possession of atomics bombs would be much more dangerous than they already where. When America became involved in WWII, the development of atomic bombs started there in what was called the ‘Manhattan Project’. In July 1945 an atomic bomb was tested in the New Mexico desert. The tests were considered a success, and America was now in possession of one of the world’s deadliest weapons.

In 1945, at the end of World War II and the beginning of the Cold War, nuclear weapons were applied to kill for the first time in Japan. On August 6, a uranium bomb by the name of Little Boy was dropped on Hiroshima, followed by a plutonium bomb by the name of Fat Man on Nagasaki on August 9. The reason Hiroshima was picked was that it was a major military centre. The bomb detonated at 8.15 p.m. over a Japanese Army parade field, where soldiers were already present. Nagasaki was picked because it was an industrial centre. The bomb, which was much larger than that used on Hiroshima, exploded at 11.02 a.m. at an industrial site. However, the hills on and the geographical location of the bombing site caused the eventual impact to be smaller than days earlier in Hiroshima.

The first impact of the atomic bombings was a blinding light, accompanied by a giant wave of heat. Dry flammable materials caught fire, and all men and animals within half a mile from the explosion sites died instantly. Many structures collapsed, in Nagasaki even the structures designed to survive earthquakes were blasted away. Many water lines broke. Fires could not be extinguished because of the water shortage, and six weeks after the blast the city still suffered from a lack of water. In Hiroshima a number of small fires combined with wind formed a firestorm, killing those who did not die before but were left immobile for some reason. Within days after the blasts, radiation sickness started rearing its ugly head, and many more people would die from it within the next 5 years.

The total estimated death toll:
In Hiroshima 100,000 were killed instantly, and between 100,000 and 200,000 died eventually.
In Nagasaki about 40,000 were killed instantly, and between 70,000 and 150,000 died eventually.

The events of August 6 and August 9 can be translated into environmental effects more literally. The blasts caused air pollution from dust particles and radioactive debris flying around, and from the fires burning everywhere. Many plants and animals were killed in the blast, or died moments to months later from radioactive precipitation. Radioactive sand clogged wells used for drinking water winning, thereby causing a drinking water problem that could not easily be solved. Surface water sources were polluted, particularly by radioactive waste. Agricultural production was damaged; dead stalks of rice could be found up to seven miles from ground zero. In Hiroshima the impact of the bombing was noticeable within a 10 km radius around the city, and in Nagasaki within a 1 km radius.