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Castle Bravo vs. Ivy Mike - Comparison of sizes
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Castle Bravo
Ivy Mike

Drop a bomb over your town - Bomb simulator

Castle Bravo
Ivy Mike
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Castle Bravo

Castle Bravo
Castle Bravo
Blast Radius Blast Radius11.3km
Fireball Radius Fireball Radius 3.710km
Kilotons Kilotons15000kt
Radiation Radius Radiation Radius3.630km

Castle Bravo was the first in a series of high-yield thermonuclear weapon design tests conducted by the United States at Bikini Atoll, Marshall Islands, as part of Operation Castle. Detonated on March 1, 1954, the device was the most powerful nuclear device detonated by the United States and its first lithium deuteride fueled thermonuclear weapon. Castle Bravo's yield was 15 megatons of TNT, 2.5 times the predicted 6.0 megatons, due to unforeseen additional reactions involving lithium-7, which led to the unexpected radioactive contamination of areas to the east of Bikini Atoll. At the time, it was the most powerful artificial explosion in history. Fallout, the heaviest of which was in the form of pulverized surface coral from the detonation, fell on residents of Rongelap and Utirik atolls, while the more particulate and gaseous fallout spread around the world.



The inhabitants of the islands were not evacuated until three days later and suffered radiation sickness. Twenty-three crew members of the Japanese fishing vessel Daigo Fukuryū Maru ("Lucky Dragon No. 5") were also contaminated by the heavy fallout, experiencing acute radiation syndrome. The blast incited international reaction over atmospheric thermonuclear testing.The Bravo Crater is located at 11°41′50″N 165°16′19″E. The remains of the Castle Bravo causeway are at 11°42′6″N 165°17′7″E.

Source: Wikipedia
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Ivy Mike

Ivy Mike
Ivy Mike
Blast Radius Blast Radius9.990km
Fireball Radius Fireball Radius 3.200km
Kilotons Kilotons10400kt
Radiation Radius Radiation Radius3.400km

Ivy Mike was the codename given to the first full-scale test of a thermonuclear device, in which part of the explosive yield comes from nuclear fusion. Ivy Mike was detonated on November 1, 1952, by the United States on the island of Elugelab in Enewetak Atoll, in the now independent island nation of the Marshall Islands, as part of Operation Ivy. It was the first full test of the Teller–Ulam design, a staged fusion device.Due to its physical size and fusion fuel type (cryogenic liquid deuterium), the "Mike" device was not suitable for use as a deliverable weapon.



It was intended as a "technically conservative" proof of concept experiment to validate the concepts used for multi-megaton detonations.As a result of the collection of samples from the explosion by U.S. Air force pilots, scientists found traces of the isotopes plutonium-246 and plutonium-244, and confirmed the existence of the predicted but undiscovered elements einsteinium and fermium.

Source: Wikipedia

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