Sunspots are areas of intense magnetic activity, as is apparent in this image: If you were to put a sunspot in the night sky, it would glow brighter than the Full Moon with a crimson-orange color! They are dark only by contrast with the much hotter solar surface. Sunspots are actually several thousand degrees cooler than the 5,770 K (5496.8 ☌) surface of the Sun, and contain gases at temperature of 3000 to 4000 K (2726.9 - 3726.8 ☌).
Magnetic fields produce pressure, and this pressure can cause gas inside the sunspot to be in balance with the gas outside the sunspot.but at a lower temperature. Scientists do not yet know how this happens. Sunspots are actually regions of the solar surface where the magnetic field of the Sun becomes concentrated over 1000-fold.
While sunspots have a temperature of about 6300 ☏ (3482.2 ☌), the surface of the sun which surrounds it has a temperature of 10,000 ☏ (5537.8 ☌).
Typical sunspots have a dark region (umbra) surrounded by a lighter region, the penumbra.
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