In 780 BC, an earthquake of magnitude 6-7 occurred in the Western Zhou Dynasty (Du Gao, now northwest of Chang 'an, Shaanxi Province) and Sanchuan (Jingwei, Weihe and Luoshui), causing a solar eclipse. Ye Ye got an electric shock and fidgeted. Hundreds of rivers boil and hills collapse. The high shore is a valley, and the deep valley is a mausoleum. Sanchuan dried up and Qishan (now northeast of Qishan, Shaanxi Province) collapsed.