View credits, reviews, tracks and shop for the Vinyl release of "Photosphere / Auroral Activity" on Discogs. Download Solar - Photosphere / Auroral Activity | Photosphere,Auroral Activity Album Free. Shop Photosphere / Auroral Activity. Everyday low prices and free delivery on eligible Photosphere / Auroral Activity. Solar (4) (Artist) Format: Vinyl. Sun spot numbers are dark and irregular spots which are usually appear in groups on the sun's photosphere and disappear after a few days or week. Sun spot. Auroral Oval: The ring-shaped belts of auroral activity around the north and of the solar atmosphere that is located above the photosphere and beneath. It is sometimes referred to as the solar "surface", although the density of the gaseous hydrogen and helium at the photosphere is only about 1/ of the sea-. Keywords: Aurora; Solar activity; Extreme events; Historical records; sunspots appearing on the solar photosphere and the formation of auroras in the. Sunspots are regions on the Sun's photosphere that appear darker than the For this reason, high auroral activity tends to occur every 27 days. In the vicinity of the Earth, results of solar activity include auroras These three regions of the Sun (photosphere, chromosphere and corona) each have. A solar flare is a violent eruption of plasma from the chromosphere of the The aurora borealis and aurora australis are results of flare activity that.