Cro-Magnon cave paintings are believed to be the first known display of auroras and are about 30,000 years old.

also:

>The oldest known auroral citing was written in 2600 B.C. in China: >"Fu-Pao, the mother of the Yellow Empire Shuan-Yuan, saw strong >lightning moving around the star Su, which belongs to the >constellation of Bei-Dou, and the light illuminated the whole area." >Thousands of years later, in 1570 A.D., a drawing of the aurora >depicted candles burning above the clouds.

https://www.nasa.gov/mission_pages/themis/auroras/aurora_history.html