《宋书·志·卷三十四》
太元十八年正月癸亥曰，初一，地震；二月乙末日，地震。
太元十八年正月癸亥朔，地震；二月乙未，地震。
On the early morning of the Kuihai day of the first month of the 18th year of Taiyuan, there was an earthquake; on the Yimo day of the second month, there was an earthquake.