240,000 People Killed in 23 Seconds: The Tangshan Earthquake

China's Tangshan earthquake ranks among the deadliest natural disasters ever recorded. Decades later, it still shapes how the world thinks about seismic risk, disaster preparedness, and long-term recovery. Here's what happened, why the death toll climbed so high, and how the city responded in the decades that followed.

When and Where It Happened

The earthquake struck the industrial city of Tangshan in China's Hebei province at 3:42 a.m. on July 28, 1976. Tangshan sits roughly 68 miles east of Beijing, and the quake nearly leveled the coal-mining and industrial city. Shaking lasted only 14 to 16 seconds, but tremors were felt more than 680 miles away in every direction.

A major aftershock, magnitude 7.1, hit the nearby city of Luanxian just hours later, adding more damage and casualties while slowing rescue efforts already underway.

How Strong Was the Earthquake