Quite a large amount of the heat from the Sun'score is moved up towards the surface by 'convection' - hotmaterial rising to the top of colder matter. But in regionswhere there is a strong magnetic field, the convection isstopped, so not so much heat reaches the surface. Thismeans the temperature in an area with this high magneticfield is around 3600 C - very hot, but not when compared with5,500 C across the rest of the photosphere. Seen againstthis very bright background, the cooler area appears darker.
Sunspots form in pairs - one at each end of the magneticloop, and usually last for a few days.
Occasionally largergroups can form, which persist for weeks. Kindly find below the results of JAS as observed by Ahmad Al-Niamat. Efp Ef Cond. Picture very contrasty and clear, granulation visible. Sun's limb or spots in slight motion, granulation visible only from time to time.