"Scientists have found evidence of a huge blast of radiation from the Sun that hit Earth more than 2,000 years ago.We are now reaching the point of being able to detect storms heading our way from the sun. Protecting our technology against these rare events is difficult so shutting down is likely the only option.
The result has important implications for the present, because solar storms can disrupt modern technology.
The team found evidence in Greenland ice cores that the Earth was bombarded with solar proton particles in 660BC.
The event was about 10 times more powerful than any since modern instrumental records began."
See also 'Solar storm' in Wikipedia
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