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

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May 22, 2026 - 16:05
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An ancient solar storm left clues in tree rings and a famous poet's diary: 'Red lights in the northern sky'
A Japanese poet wrote in his diary that "red lights" appeared in the sky over Kyoto. An analysis of tree rings suggests a powerful solar storm created the sight.

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