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Solar Week - Ask a Question » Archives of previous runs of Solar Week » 2005 Sep26-30 » Sunspots » sunspots

sunspots

Last post 09-28-2005 1:25 PM by Sarah Gibson. 1 replies.
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  • 09-28-2005 8:18 AM

    sunspots

    Reply Contact

    Fiona T (DIA)

     

    How are sunspots formed, and how long can they last?

  • 09-28-2005 1:25 PM In reply to

    Re: sunspots

    Reply Contact
    Hi!

    Sunspots are formed when regions at regions of strong magnetic field at the Sun's surface. HEating is suppressed by the strong fields, so these regions are cooler, and so appear darker. Sunspots typically last for several days, but can last for several weeks if they are very large.

    cheers,
    Sarah
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