The Tsar Bomba: 57 megatons of TNT 

In the First photo the Tsar Bomba mushroom cloud seen from a distance of 160 km (99.4 miles). The crown of the cloud is 56 km (34.8 miles) high at the time of the picture.

In the second one the Tsar Bomba’s fireball, about 8 kilometres (5.0 mi) in diameter, was prevented from touching the ground by the shock wave, but nearly reached the 10.5 kilometres (6.5 mi) altitude of the deployingTu-95 bomber.