The spray dome from the Hardtack Umbrella underwater nuclear test on the Enewetak lagoon, June 9th 1958

The detonation occurred at 11:15 AM (local time) with clear skies and a 15 to 17-knot wind from the east-northeast. Within one-tenth of a second, the spray dome had broken through the surface. The overall shape of the spray dome resembled a vertical column with the plumes helping create the shape. Within 20 seconds of detonation, the maximum height of the column reached 5,000 feet. The base surge reached a distance around 10,000 feet downwind, reaching out approximately 6,000 feet in all directions. This base surge could be seen from the air for about 25 minutes and the foam patch over the blast location lasting even longer. The blast yield of the nuclear device was measured to be eight kilotons. The Umbrella blast created a crater 3,000 feet (914 m) in diameter and 20 feet (6 m) in depth in the lagoon. […] After all scientific data had been gathered from the target ships, they were restored to be seaworthy and towed back to Pearl Harbour. The Moran was concluded to be unseaworthy due to the blast and was sunk by naval gunfire near Ikuren Island.

text abridged from here

Trinity, the world’s first nuclear explosion, 25 milliseconds after detonation, Alamogordo Bombing Range, New Mexico, 16 July 1945

When the Gods Came by John Adams (aka, John S. Glasby)
Badger Books SF-31, 1960
Cover by M. D’Antona

The 140-kiloton Chagan nuclear test, Soviet Union, 1965