guido joon Wynnewood, Pennsylvania No.209
When Bravo was detonated, it formed a fireball almost 4.5 miles (7.2 km) across within a second. This fireball was visible on Kwajalein atoll over 250 miles (400 km) away. The explosion left a crater 6,500 feet (2,000 m) in diameter and 250 feet (76 m) in depth. The mushroom cloud reached a height of 47,000 feet (14,000 m) and a diameter of 7 miles (11 km) in about a minute, a height of 130,000 feet (40 km) and 62 mi (100 km) in diameter in less than 10 minutes and was expanding at more than 100 meters per second (360 km/h; 220 mph). As a result of the blast, the cloud contaminated more than 7,000 square miles (18,000 km2) of the surrounding Pacific Ocean, including some of the surrounding small islands like Rongerik, Rongelap, and Utirik.
In terms of TNT equivalence, Castle Bravo was about 1,000 times more powerful than each of the atomic bombs that were dropped on Hiroshima and Nagasaki during World War II.
Hector Reyes Center Moriches, New York No.5133 +1