that would be a billion, 200 million pounds. I kind of doubt that.
Check the article and photos at the link. It happened in that quantity. Debris blown 22 miles away.
Photos at the link, include hundreds of 14” naval gun rounds, without their detonators certainly but full of HE. Standing there taking the photo? Not me.
Other photos show multiple intact rounds laying around. 4” , 88mm equiv.
Oh yeah, it happened. Must have made a hell of a boom.
Look it up.