Deadly “red sky” solar storm from 800 years ago discovered in ancient trees
Latest Science News -- ScienceDaily·May 14, 2026
Researchers in Japan have discovered a powerful solar radiation event that occurred around 1200 CE, which was previously unknown. The team made this finding by analyzing ancient tree rings and centuries-old sky observations, including reports of eerie red auroras. The event, which caused a "red sky," was linked to spikes of carbon-14 trapped in buried wood, indicating a significant increase in solar activity. The discovery suggests that the Sun was more active during this period, with shorter solar cycles than usual.
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