《宋书·志·卷三十四》
晋安帝义熙八年三月壬寅，山阴发出像雷鸣似的声音，地面下陷，面积为四尺见方，陷下四尺深。
晋安帝义熙八年三月壬寅，山阴有声如雷，地陷深广各四尺。
On the Renyin day in the third month of the eighth year of Emperor An's Yixi era (412), there was a thunderous noise in Shanyin and the ground sank in an area four feet square, to a depth of four feet.