By far the deadliest earthquake in history occurred nearly 500 years ago in China. Located just east of the center of modern-day China, the Shaanxi province was struck by a magnitude 8 earthquake that ended up killing over 830,000 people.
A staggering 840-kilometer-wide area was leveled and some counties reported a death toll of up to 60% of their total population.
The Small Wild Goose Pagoda, depicted above, lost 1.6 meters from its height due to shaking.
Despite being of a lower magnitude, millions at the time lived in loess caves in high cliffs, which are soft clay that are prone to erosion. When the quake struck, their homes collapsed and trapped nearly a million people.