Spotted: another coronal cavity


YouTube and Helioviewer.org user sedge2002 found another coronal cavity. This one was on the Sun late 2011 to early 2012. It appears towards the end of this movie, at around 30-45 degrees clockwise from the north pole of Sun, above the limb:

Thanks to sedge2002 for making this movie and sharing it with other users of Helioviewer.org. As the movie demonstrates, coronal cavities do occur, and so the one you may have earlier in the week, whilst a great example of a coronal cavity, is definitely not unique. What is a coronal cavity? Let Dr. Alex Young of the The Sun Today tell you:

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  1. #1 by Nikola on March 17, 2012 - 11:52 pm

    Here magnetic indignations and flashes aren’t present
    http://www.youtube.com/watch?v=ODRTyPI9jP0
    Here magnetic indignations and emission are present
    http://www.youtube.com/watch?v=MkZjLvvvW08
    Pay attention that date, time and coordinates coincide. Only registering devices different

  2. #3 by Nikola on March 18, 2012 - 12:36 pm

    Thanks keith !

  3. #4 by Ayauho on March 21, 2012 - 6:47 am

    The cavity on this video and the object that appeared from 03.08 to 03.12 are different. The main difference between them is disappearance. It was clearly seen that 03-12 object distanced from Sun dragging the jet & leaving a disturbance on the Sun’s surface unlike cavity on this video which is simply dissipated. Also here we see that shape is created by curved lines is not saved even a few hours while the 03-12 object keeps precise form for more then 1 day & continued to keep it even during departure.

  4. #5 by sedge2002 on March 21, 2012 - 1:55 pm

    Hi

    Wow!! Thanks for the mention. I became interested in this phenomenon after seeing the rather large coronal cavity that was the sweep of the internet last week so i decided to trawl through data to see if i could find any others. Low and behold i found this one, although it does not stay as long as the one which went viral with reports of it being “something else” I was surprised to see you picked it up. I have noticed another forming today in the suns 5 oclock position. I will keep going back through the data to see if i can find more.

    Sedge2002.

  5. #6 by diego lamana on March 21, 2012 - 11:18 pm

    I like astronomy
    voceis can send picture of the sun for me
    ?

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