“It's a fascinating time. It's the quietest sun in a century,
since the solar cycle of 1902 to 1913. ”
- Mark Miesch, Ph.D., NCAR's High Altitude Observatory
April 7, 2009 Huntsville, Alabama and Boulder, Colorado - A sunspot is a region of intense magnetic activity on the Sun's surface that are cooler than the rest of the sun. That's why they appear as dark spots. Sunspots are at temperatures of roughly 4,000 to 4,500 Kelvin, which is 6,740 to 7,640 degrees Fahrenheit, and are surrounded by hotter solar material around 5,800 Kelvin, or 9,980 degrees Fahrenheit.
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