Powerful superflares could pose a threat to Earth. Every 1,000 years or so, the Sun emits superflares that are at least 100 times stronger than the 1859 solar flare that caused the Carrington Event ⁠— which started fires, produced aurorae in Cuba, and shocked telegraph operators around the world.

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Powerful superflares could pose a threat to Earth. Every 1,000 years or so, the Sun emits superflares that are at least 100 times stronger than the 1859 solar flare that caused the Carrington Event ⁠— which started fires, produced aurorae in Cuba, and shocked telegraph operators around the world.