Strength of the most powerful nuclear weapons since 1945
those developed by the United States and Soviet Union in the decades that followed.
To this day, the atomic bombings of Hiroshima and Nagasaki remain the only instances in history where nuclear weapons were used in warfare. The weapons used in these attacks had blast yields equal to 16 kilotons and 21 kilotons of TNT respectively, and resulted in the immediate deaths of over 100,000 people, over 200,000 deaths by the year's end, and they each destroyed a significant portion of these cities. However, the strength of the bombs used in the Second World War pale in comparison to