Looks to me like both magazine and fuel going up.
The Empire of Japan earned what it got, including the event depicted in the second picture.
My Uncle Dave was in the Navy aboard the cruiser USS Santa Fe and barely survived combat in the Pacific and my late father-in-law was a Marine. My dad was getting ready to graduate high school in 1945 and he would have been drafted into the fighting had the bombs not been dropped. My father-in-law was wounded on Iwo Jima. He was recuperating from his wounds when the bombs were dropped and like a million other guys in the Pacific he got to see his next birthday. He came home, married and started a family, four girls, one of whom today is my wife.