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NASA's SDO observes largest sunspot of the solar cycle

Date:
October 24, 2014
Source:
NASA
Summary:
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.
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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.


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Materials provided by NASA. Note: Content may be edited for style and length.


Cite This Page:

NASA. "NASA's SDO observes largest sunspot of the solar cycle." ScienceDaily. ScienceDaily, 24 October 2014. <www.sciencedaily.com/releases/2014/10/141024171020.htm>.
NASA. (2014, October 24). NASA's SDO observes largest sunspot of the solar cycle. ScienceDaily. Retrieved March 18, 2024 from www.sciencedaily.com/releases/2014/10/141024171020.htm
NASA. "NASA's SDO observes largest sunspot of the solar cycle." ScienceDaily. www.sciencedaily.com/releases/2014/10/141024171020.htm (accessed March 18, 2024).

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