Image:Sunspot with Earth Comparison.jpg
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[edit] Summary
Active region 9393 as seen by the MDI instrument on SOHO hosted the largest sunspot group observed so far during the current solar cycle. On 30 March 2001, the sunspot area within the group spanned an area more than 13 times the entire surface of the Earth. It was the source of numerous flares and coronal mass ejections, including one of the largest flares recorded in 25 years on 2 April 2001. Caused by intense magnetic fields emerging from the interior, a sunspot appears to be dark only when contrasted against the rest of the solar surface, because it is slightly cooler than the unmarked regions.
Images courtesy of NASA. The author composited the images, added the annotation, and removed the date stamp from the inset.
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This file is in the public domain because it was created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (NASA copyright policy page or JPL Image Use Policy).
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- (del) (cur) 21:33, 19 February 2007 . . Greg L (Talk | contribs) . . 1150×324 (258,064 bytes) (Active region 9393 as seen by the MDI instrument on SOHO hosted the largest sunspot group observed so far during the current solar cycle. On 30 March 2001, the sunspot area within the group spanned an area more than 13 times the entire surface of )
- (del) (rev) 22:32, 18 February 2007 . . Greg L (Talk | contribs) . . 1150×324 (262,391 bytes)
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| Orientation | Normal |
|---|---|
| Horizontal resolution | 71 dpi |
| Vertical resolution | 71 dpi |
| Software used | Adobe Photoshop 7.0 |
| File change date and time | 13:29, 19 February 2007 |
| Color space | 65535 |
