<Tr> <Td> 6997300000000000000 ♠ 3 × 10 </Td> <Td> 3.49 GWh </Td> <Td> The Halifax Explosion in 1917 was the accidental detonation of 3,000 tons of TNT . </Td> </Tr> <Tr> <Td> 6997400000000000000 ♠ 4 × 10 </Td> <Td> 9.3 GWh </Td> <Td> Minor Scale, a 1985 United States conventional explosion, using 4,744 tons of ANFO explosive to provide a scaled equivalent airblast of an eight kiloton (33.44 TJ) nuclear device, is believed to be the largest planned detonation of conventional explosives in history . </Td> </Tr> <Tr> <Td> 6998150000000000000 ♠ 1.5 × 10--6998200000000000000 ♠ 2 × 10 </Td> <Td> 17.4--23.2 GWh </Td> <Td> The Little Boy atomic bomb dropped on Hiroshima on August 6, 1945, exploded with an energy of about 15 kilotons of TNT (63 TJ), and the Fat Man atomic bomb dropped on Nagasaki on August 9, 1945, exploded with an energy of about 20 kilotons of TNT (84 TJ). The modern nuclear weapons in the United States arsenal range in yield from 0.3 kt (1.3 TJ) to 1.2 Mt (5.0 PJ) equivalent, for the B83 strategic bomb . </Td> </Tr> <Tr> <Td> </Td> <Td> 1.16 TWh </Td> <Td> The energy contained in one megaton of TNT (4.2 PJ) is enough to power the average American household for 103,000 years . The 30 Mt (130 PJ) estimated upper limit blast power of the Tunguska event could power the aforementioned home for just over 3,104,226 years . To put that in perspective, the energy of that blast could power the entire United States for 3.27 days . </Td> </Tr>

How much energy was released by the hiroshima bomb