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Giant sunspot, larger than Earth's diameter, appears on sun

Date:
January 7, 2014
Source:
NASA/Goddard Space Flight Center
Summary:
An enormous sunspot, labeled AR1944, slipped into view over the sun's left horizon late on Jan. 1, 2014. The sunspot steadily moved toward the right, along with the rotation of the sun, and now sits almost dead center, as seen in the image above from NASA's Solar Dynamics Observatory.

One of the largest sunspots in the last nine years, labeled AR1944, was seen in early January 2014, as captured by NASA's Solar Dynamics Observatory. An image of Earth has been added for scale.
Credit: NASA/SDO

An enormous sunspot, labeled AR1944, slipped into view over the sun's left horizon late on Jan. 1, 2014. The sunspot steadily moved toward the right, along with the rotation of the sun, and now sits almost dead center, as seen in the image above from NASA's Solar Dynamics Observatory.

Sunspots are dark areas on the sun's surface that contain complex arrangements of strong magnetic fields that are constantly shifting. The largest dark spot in this configuration is approximately two Earths wide, and the entire sunspot group is some seven Earths across. For comparison, another giant sunspot, five to six Earths across, is shown below from 2005.

The image was captured by the European Space Agency and NASA's Solar and Heliospheric Observatory. Sunspots are part of what's known as active regions, which also include regions of the sun's atmosphere, the corona, hovering above the sunspots.

Active regions can be the source of some of the sun's great explosions: solar flares that send out giant bursts of light and radiation due to the release of magnetic energy, or coronal mass ejections that send huge clouds of solar material out into space. As the sunspot group continues its journey across the face of the sun, scientists will watch how it changes and evolves to learn more about how these convoluted magnetic fields can cause space weather events that can affect space-borne systems and technological infrastructure on Earth.


Story Source:

The above story is based on materials provided by NASA/Goddard Space Flight Center. Note: Materials may be edited for content and length.


Cite This Page:

NASA/Goddard Space Flight Center. "Giant sunspot, larger than Earth's diameter, appears on sun." ScienceDaily. ScienceDaily, 7 January 2014. <www.sciencedaily.com/releases/2014/01/140107215515.htm>.
NASA/Goddard Space Flight Center. (2014, January 7). Giant sunspot, larger than Earth's diameter, appears on sun. ScienceDaily. Retrieved April 24, 2014 from www.sciencedaily.com/releases/2014/01/140107215515.htm
NASA/Goddard Space Flight Center. "Giant sunspot, larger than Earth's diameter, appears on sun." ScienceDaily. www.sciencedaily.com/releases/2014/01/140107215515.htm (accessed April 24, 2014).

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