Wanggongchang explosion

The Wanggongchang explosion in 17th-century China killed 20,000 people, released roughly the same amount of energy as the atomic bomb dropped on Hiroshima, and contributed to the eventual fall of the Ming dynasty. Survivors reported broken rocks, timber, body parts of men and animals raining down from the sky for hours, with the bodies of victims all naked with their clothes mysteriously stripped off. The cause of the explosion has never been conclusively determined.