When Bravo was detonated, it formed a fireball almost four and a half miles (roughly 7 km) across within a second. This fireball was visible on the Kwajalein atoll over 250 miles (450 km) away. The explosion left a crater of 6,500 feet (2,000 m) in diameter and 250 feet (75 m) in depth.
15 Megaton bomb.
Drop ‘em on Iran, repeat as necessary.
Crater Dimensions:
Crater shape is normal in spite of atmospheric crushing; fragments are not significantly dispersed.
Transient Crater Diameter: 296 km = 184 miles
Transient Crater Depth: 105 km = 65 miles
Final Crater Diameter: 623 km = 387 miles
Final Crater Depth: 2.05 km = 1.28 miles
The crater formed is a complex crater.
The volume of the target melted or vaporized is 1.09e+06 km3 = 262000 miles3
Roughly half the melt remains in the crater , where its average thickness is 15.9 km = 9.86 miles
Thermal Radiation:
Time for maximum radiation: 19.9 seconds after impact
Visible fireball radius: 915 km = 568 miles