Medieval poets wrote about auroras. Their work is providing clues to the solar cycle

https://www.oist.jp/news-center/news/2026/4/10/medieval-japanese-poetry-and-buried-trees-help-elucidate-volatile-space-weather
Red aurora over Engaru, Hokkaido, Japan -  Early morning, August 13, 2024  
© Tomohiro M. Nakayama (CC-BY-NC)

OIST’s recent research has been featured on Scientific American.

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