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File:NASA's SDO Observes Largest Sunspot of the Solar Cycle (15430820129).jpg

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On Oct. 18, 2014, a sunspot rotated over the left side of the sun, and soon grew to be the largest active region seen in the current solar cycle, which began in 2008. Currently, the sunspot is almost 80,000 miles across -- ten Earth's could be laid across its diameter.

Sunspots point to relatively cooler areas on the sun with intense and complex magnetic fields poking out through the sun's surface. Such areas can be the source of solar eruptions such as flares or coronal mass ejections. So far, this active region – labeled AR 12192 -- has produced several significant solar flares: an X-class flare on Oct. 19, an M-class flare on Oct. 21, and an X-class flare on Oct. 22, 2014.

The largest sunspot on record occurred in 1947 and was almost three times as large as the current one.

Active regions are more common at the moment as we are in what's called solar maximum, which is the peak of the sun's activity, occurring approximately every 11 years.

Credit: NASA/SDO

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Source NASA's SDO Observes Largest Sunspot of the Solar Cycle
Author NASA Goddard Space Flight Center from Greenbelt, MD, USA

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This image was originally posted to Flickr by NASA Goddard Photo and Video at https://flickr.com/photos/24662369@N07/15430820129. It was reviewed on 17 September 2016 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

17 September 2016

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current20:24, 17 September 2016Thumbnail for version as of 20:24, 17 September 20161,024 × 1,024 (236 KB)Vanished Account ByeznhpyxeuztibuoTransferred from Flickr via Flickr2Commons

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