Unit of energy commonly used to quantify laerge amounts of energy. 1 ton of TNT releases about 4.2x10^9 Joules upon explosion, therefore 1 kiloton of TNT is 4.2x10^12 Joules, and 1 Megaton of TNT is 4.2x10^15 joules. TNT is a three-letter abbreviation with multiple meanings, including: Chemicals, hi Trinitrotoluene, the chemical explosive usually known as TNT. Alkyl nitrites, TNT is a UK brand for this medicinal and recreational drug. ...

For example, if to burn 1 kg of matter into energy completely, one gets E= mc^2 = 1 kg x (3x10^8 m/s)^2 = 9x10^16 Joules = 21,4 Megatons of TNT equivalent amound of energy. Matter is commonly defined as the substance of which physical objects are composed. ...

1 megaton is quite large amount of energy. The first atomic bomb dropped on Hiroshima in August 6 1945 exploded with the energy ~ 20 kilotons of TNT (~8.4x10^13 Joules). The mushroom cloud of the atomic bombing of Nagasaki, Japan, 1945, rose some 18 km (11 mi) above the epicenter. ... The city of Hiroshima ) is the capital of Hiroshima Prefecture, and the largest city in the Chugoku region of western Honshu, the largest of Japans islands. ...

Current nuclear warheadss in Russia and USA stockpile range from 1 MT to 20 MT TNT equivalent. The mushroom cloud of the atomic bombing of Nagasaki, Japan, in 1945 lifted nuclear fallout some 18 km (60,000 feet) above the epicenter. ...

1 MT equivalent exploded on the ground or slightly above ground create crater ~ 0.3 mile in diameter and level practically everything in a few mile radius.