* The author is part of the community of readers of La Vanguardia
This Friday at dawn from Gavà beach, in Baix Llobregat, the sun has shown itself with measles, that is, with sunspots, as can be seen in The Photos of the Readers of La Vanguardia.
A sunspot is a region of the sun that has a lower temperature than its surroundings and with intense magnetic activity.
The sunspot consists of a dark central region, called the "umbra," surrounded by a lighter "penumbra."
A single spot can measure up to 12,000 km (almost as large as the diameter of the Earth), but a group of spots can reach 120,000 km in size or more.
In addition, the day has dawned with a lot of Saharan dust, spectacular, giving a tonality to the sun and to the postcard sky with the fisherman next to the shore of the beach and a plane flying over the scene.
