Scientists discovered the oldest written record of auroras on 2,700-year-old cuneiform tablets from Babylonian and Assyrian astrologers. The tablets reference a "red glow" covering the entire sky at the same time solar activity peaked (based on spikes in radioactive Carbon-14 found in tree rings).
http://www.astronomy.com/news/2019/10/ancient-middle-eastern-astrologers-recorded-the-oldest-known-evidence-of-auroras