The atomic bomb exploded 132 degree 27 minutes 27 seconds at 600m height. It exploded above Shima Hospital located at Saikumachi in Hiroshima city. Shima hospital was built in 1933 as a two story brick building in modern style, and had expressive poles on each side of the entrance and circle windows. Today, the explanation board explaining the exposure of the A-bomb tells the atmosphere of that day.