Video encyclopedia

01/03/1954 Bikini H-bomb

The United States detonated a thermonuclear device at the Bikini Atoll in the Pacific Ocean. The operation was codenamed Castle Bravo. The bomb's yield was 15 megatons of TNT. It was 6 times the predicted 6 megatons, due to unforeseen additional reactions in the device. It was the most powerful U. S. nuclear detonation.


  • Essentials 

  • Bomb design 

  • Detonation 

  • High levels of fallout 

  • Weapon history 

  • Health impacts 

  • In popular culture