The quake on July 28 (8.2 on the Richter Scale) probably was the worst of the century in China in terms of casualties and damage. The destruction of nearly all housing in the area--particularly at Tang-shan city (population 1 million) and Feng-nan County (population 400,000)--indicates that casualties were extremely high. Estimates of fatalities range from 100,000 to 800,000.