The sun fired off another powerful solar flare on Sunday, Sept. 10. It was the seventh solar flare in seven days.
There are three categories of solar flares, and Sunday's was the highest classification: an "X" event. Two of the other recent flares were also X-class, including Wednesday's (Sept. 6) X9.3 flare, the strongest solar blast in 12 years.
The effects of such powerful flares include interruption or degraded communications on land and at sea.
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