The 1976 Tangshan earthquake struck on July 28, 1976, in the city of Tangshan, China. It registered a magnitude of 7.5 and occurred at 3:42 AM local time. The earthquake caused widespread destruction, leveling buildings and infrastructure in the region. The disaster resulted in a significant loss of life, with estimates of casualties ranging from 240,000 to 650,000 people. The Tangshan earthquake is considered one of the deadliest earthquakes in history, prompting changes in building codes and disaster preparedness in China and around the world.