The Sun as of 20:00 UT on Nov. 3, 2011. AR 1339 is on the northwest limb. Credit SDO/GSFC

Largest Sunspot in Years Now on the Sun

4 Nov , 2011


One of the largest sunspots in years is now visible, rotating around into view on the Sun’s limb on November 3, 2011. And it’s a feisty one, too. The Solar Dynamics Observatory team called Active Region 1339 a “Bad Boy,” as at 20:27 UTC, a solar flare peaked at X1.9. X-class flares are massive, and can be major events that can trigger planet-wide radio blackouts and long-lasting radiation storms. This region is not facing Earth — yet. But we’ll be keeping on eye on it as it turns toward an Earth-facing direction.

See a full-Sun image from SDO below.


This sunspot is huge, measuring some 40,000 km wide and at over 80,000 in length. said two or three of the sunspot’s dark cores are wider than Earth itself.

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serial_ tech
serial_ tech
November 6, 2011 4:49 PM

I can has aurora in NC plz? grin