The Dec. 16, 1920 Haiyuan earthquake — which registered a 7.8 magnitude on the Richter scale — caused rivers to change course and sent landslides pouring down mountains. Destruction stretched across seven Chinese provinces. Sujiahe, a town in in Xiji County, was completely buried under a landslide. An estimated 200,000 people died in the disaster, which was felt as far away as Norway.