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Monster Sunspot Threatens to Unleash Solar Flares

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Today, NASA Space.com scientists announced the formation of a new giant sunspot on the Sun’s surface. This sunspot will be large enough for amateur telescopes to see. Scientists expect a new series of solar flares to emerge soon.

Monster Sunspot Threatens to Unleash Solar Flares

An enormous sunspot group has taken shape on the surface of the sun, hinting that our star may soon start spouting off some powerful storms.

The huge sunspot complex, known as AR 1476, rotated into Earth’s view over the weekend. It measures more than 60,000 miles (100,000 kilometers) across, researchers said. Scientists with NASA’s Solar Dynamics Observatory mission, a space-based telescope watching the sun, dubbed the solar structure a “monster sunspot” in a Twitter announcement.

AR 1476 is big enough for amateur astronomers with decent equipment to spot from their backyards, weather permitting. (Warning: Never look at the sun directly with telescopes or the unaided eye. Special filters are required for safe solar viewing to avoid serious eye damage.)

“With at least four dark cores larger than Earth, AR 1476 sprawls more than 100,000 km from end to end, and makes an easy target for backyard solar telescopes,” spaceweather.com reported this week.

Big solar flares are often associated with coronal mass ejections (CMEs), massive clouds of solar plasma that streak through space at 3 million mph (5 million kph) or more. If these clouds hit Earth, they can wreak havoc, spawning geomagnetic storms that can disrupt GPS signals, radio communications and power grids. CMEs also often super-charge the northern and southern lights, providing dazzling shows for skywatchers at high latitudes.

Monday evening’s eruption from AR 1471 apparently generated an Earth-directed CME, which should hit Earth sometime Wednesday morning (May 9) Eastern time, researchers said.

After remaining surprisingly quiet from 2005 through 2010, our star began waking up last year, spouting off numerous powerful flares and CMEs.

Most experts expect such outbursts to continue over the next year or so. Solar activity waxes and wanes on an 11-year cycle, and scientists think the current one — known as Solar Cycle 24 — will peak in 2013.

Source: http://www.space.com/15580-monster-sunspot-ar1476-solar-storm.html

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This entry was posted on Tuesday, May 8th, 2012 at 12:54 pm and is filed under Articles.

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