24 October 2021 - Mission Day: 9459 - DOY: 297
Pick of The Week

A Sunspot Blossoms (October 30, 2009)

Hi-res TIF image (3.3M)

Quicktime Movie: Large ( 41M), Medium (4.3M)
MPEG Movie (8.7M)

In a nutshell, here's the story: from a blank area on the Sun to a large active region over six days. SOHO watched in extreme UV light as an active region grew dramatically (Oct. 22- 27, 2009). When viewed from the ground with just a solar filter, this area shows up as a dark sunspot group. Ironically, the two other smaller active regions fade away during this same time period. Active regions can last anywhere from hours to months. Based on its position and magnetic orientation, this active region belongs to the new solar cycle. The active region has produced a number of small flares, bringing some interesting solar activity, long missed, to the Sun.

Note: The circular flip of the Sun near the end of the clip was an intentional maneuver completed for one of SOHO's instruments.


SOHO began its Weekly Pick some time after sending a weekly image or video clip to the American Museum of Natural History (Rose Center) in New York City. There, the SOHO Weekly Pick is displayed with some annotations on a large plasma display.

If your institution would also like to receive the same Weekly Pick from us for display (usually in Photoshop or QuickTime format), please send your inquiry to steele.hill@gsfc.nasa.gov.


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Last modification: July 27, 2020

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