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LiveScience
LiveScience
Harry Baker

Giant sunspot grew 10 times wider than Earth in just 48 hours, then spat X-class flare right at us

A close-up look at the gigantic sunspot known as AR3354 on June 29. (Image credit: Michael Karrer)

An enormous, rapidly growing sunspot on the sun's surface has unleashed a mighty X-class flare — the most powerful type of solar flare the sun is capable of producing. The solar storm slammed into our planet, triggering brief radio blackouts in parts of the U.S. and elsewhere, but it could have been a lot worse, experts warned.

The enormous dark patch, named AR3354, emerged on the solar surface on June 27 and within 48 hours had grown to cover around 1.35 billion square miles (3.5 billion square kilometers), or 10 times wider than Earth. Space weather scientists were alarmed by the colossal sunspot's rapid emergence and feared it could spit out a barrage of potentially harmful solar storms, according to Spaceweather.com.

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