Significant Active Region Emerging on Sun
Posted by
JAC on 2/23/2011, 6:11 am
A significant active region is about to emerge over the sun's northeastern limb.
The underlying sunspots are not yet visible from Earth, but the region's towering magnetic canopy is already in view.
NASA's Solar Dynamics Observatory (SDO) took this picture during the early hours of Feb. 23rd:

A better view is had by NASA's STEREO-B probe, stationed over the sun's eastern limb where it can see the region from top down.

Recent movies beamed back by STEREO-B show flashes of extreme UV radiation and hints of magnetic instability.
http://stereo.gsfc.nasa.gov/browse/2011/02/21/behind_20110221_euvi_195_512.mpg
This could herald a period of renewed solar activity when the region turns toward Earth in the days ahead.
Or the action could peter out beforehand.
Stay tuned for updates.
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In this thread:
Significant Active Region Emerging on Sun - JAC, 2/23/2011, 6:11 am- Ordinary Compasses Thrown Off by Changes in Earth's Magnetic Field - JAC, 2/26/2011, 8:21 am
- EASTERN SUNSPOTS - JAC, 2/26/2011, 7:52 am
- Blog TV Tonight 8EST - Discussion with "Astrotometry" Solar-Cycle 24 - JAC, 2/25/2011, 4:11 pm
- What is up with USGS - JAC, 2/25/2011, 3:39 pm
- 3 N Hemi Coronal Holes have Popped Up. Already a Mw5.7 SE of Veracruz - JAC, 2/25/2011, 11:02 am
- Alaska Digisonde - JAC, 2/25/2011, 10:04 am
- NWS Radar Scintillation Anomaly noticed over Wabash Valley Fault Zone - JAC, 2/25/2011, 7:18 am
- Biggest Impact forecast for Sunday and Monday - JAC, 2/25/2011, 7:11 am
- A large coronal hole is emerging over the sun's eastern limb - JAC, 2/24/2011, 2:56 pm
- High Electron Flux Warning Posted. - JAC, 2/24/2011, 8:56 am
- Here we go - Major North Hemisphere Quake possible thru weekend. - JAC, 2/24/2011, 8:25 am
- M3 Flare - JAC, 2/24/2011, 7:17 am
- Whoa! - JAC, 2/24/2011, 9:28 am
- IMF Polar Angle continues in the Red Zone - JAC, 2/23/2011, 1:25 pm
- Strong scintillation halos showing up on SE CONUS NWS radar sites - JAC, 2/23/2011, 12:34 pm
- Ionospheric Precursors of Earthquakes; Recent Advances in Theory - JAC, 2/23/2011, 6:54 am
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