An ancient solar storm left clues in tree rings and a famous poet's diary: 'Red lights in the northern sky' - Space

An ancient solar storm left clues in tree rings and a famous poet's diary: 'Red lights in the northern sky' Space A red sky frightened medieval Japan, and buried trees now reveal the solar storm behind it Earth.com Deadly “red sky” solar storm from 800 years ago discovered in ancient trees ScienceDaily