päikeseaktiivsus

Päikeseaktiivsus refers to the changes and phenomena occurring on the Sun that are associated with its magnetic field. These include sunspots, solar flares, and coronal mass ejections. The Sun's activity follows an approximately 11-year cycle, during which the number of sunspots and the intensity of solar activity increase and then decrease. Sunspots are temporary phenomena on the Sun's photosphere that appear as dark spots compared to surrounding areas. They are caused by intense magnetic activity which inhibits convection, cooling the area at a localized level. Solar flares are sudden bursts of electromagnetic radiation from the Sun. Coronal mass ejections (CMEs) are large expulsions of plasma and magnetic field from the Sun's corona. These events can have significant impacts on Earth, affecting satellite operations, power grids, and radio communications. The study of päikeseaktiivsus is crucial for understanding space weather and mitigating its potential risks.