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Friday, September 9, 2011

'Old Faithful' Sunspot Keeps Spouting Off Big Solar Flares

X-Class Solar Flare

NASA's Solar Dynamics Observatory spacecraft captured this shot of the X1.8 solar flare on Sept. 7, 2011.
CREDIT: NASA/SDO

The sun has continued its string of outbursts this week, unleashing two new, powerful solar flares in two days from a region on its surface that space weather experts have now dubbed "Old Faithful."

An X-class solar flare — the most powerful type of sun storm — erupted Wednesday (Sept. 7) at 6:37 p.m. EDT (2237 GMT). Another flare blazed up today at 11:44 a.m. EDT (1544 GMT). The latter flare appears to be somewhat less intense, but scientists are still taking its measure.

These solar storms follow closely on the heels of two other big flares this week, one Monday (Sept. 5) and one Tuesday. All four storms erupted from the same area, known as sunspot 1283. Sunspots are temporary dark patches on the solar surface caused by intense magnetic activity. [Photos: Sunspots on Earth's Closest Star]

Read More: http://www.space.com/12882-sun-solar-flares-faithful-sunspot.html

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