The 1556 Shaanxi Earthquake in China is the deadliest earthquake on record, having killed approximately 830,000 people and destroyed an area 520 miles (837 km) wide. According to Chinese annals, mountains moved and rivers changed course due to the massive quake, which affected places more than 200 miles (322 km) from the epicenter. Aftershocks continued for months. In addition to the quake’s force—its magnitude is estimated at 8.0—the high death toll is attributed to what other factors? Discuss