Extreme magnetic storm: Red aurora over Kyoto in 1770

Researchers used historic accounts of a rare red aurora over Kyoto, Japan, in the 18th century to support calculations of the strength of the associated magnetic storm. The September 1770 storm could be 3-10% stronger than the September 1859 storm, the greatest storm in the past 200 years. The research provides insights that could assist preparation for an unlikely, but possible, future intense magnetic storm.

Source:: Extreme magnetic storm: Red aurora over Kyoto in 1770

      

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