crosswind aiming point Aioi Bridge Shima Surgical Clinic kilotons of TNT considered very inefficient
Due to crosswind, the bomb missed the aiming point, the Aioi Bridge, by approximately 240 m (800 ft) and detonated directly over Shima Surgical Clinic. It released the equivalent energy of 16 ± 2 kilotons of TNT (66.9 ± 8.4 TJ). The weapon was considered very inefficient, with only 1.7 percent of its material fissioning. The radius of total destruction was about 1.6 kilometers (1 mi), with resulting fires across 11 km (4.4 sq mi).
