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MDI tracks developing active regions across the near- and far-side of the Sun

MDI tracks developing active regions across the near- and far-side of the Sun

Date: 26 April 2001
Copyright: (c)1998 Digital Bitcasting Corporation

This sequence of images from SOHO's MDI instrument clearly illustrates the value of being able to 'see' through the Sun.
At the beginning of the animated sequence (1 March 2001) MDI's view of the near side of the Sun gives no hint of any unusual activity.
After about 14 days (one half solar rotation) clear evidence for strong activity on the far side of the Sun becomes apparent.
After one complete solar rotation (28 days), a large active region is visible on the near side of the Sun. This region, which is now known as AR 9393, hosts the largest sunspot group to occur in 10 years.
Another two weeks pass by and MDI's view of the far side of the Sun shows that AR 9393 is still bubbling away. The high level of activity is still apparent at the lsat frame of the sequence.
Last Update: 1 September 2019
7-Feb-2023 12:34 UT

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