《明史·志·卷三》
宣德元年八月戊辰日黄昏，天空呜响，像来势猛烈的大雨，一次接着一次传来，从东南向西南，很久纔停息。
宣德元年八月戊辰，昏刻天鸣，如雨阵迭至，自东南而西南，良久乃息。
On the twilight of the 28th day of the eighth month of the first year of the Xuande reign, the sky roared, as if a violent rainstorm was coming, coming from the southeast to the southwest, and did not stop for a long time.