After a 2-week journey through the invisible side of the Earth, the sunspot AR2665 is about to return. The rising magnetic streak of the sunspot is now visible above the eastern limb of the sun, as shown in the ultraviolet photo from NASA’s Solar Dynamics Observatory.
In early July, AR2665 crossed the visible part of the sun, causing strong geomagnetic storms, caused by its activity and reaching our planet. A huge spot remained active also during its long-distance transit, producing two powerful outbursts of coronal mass directed toward Mars.
Now AR2665 returns and very soon it will be directed towards the Earth. It remains to wait very little to find out whether this active zone will be as active as it was before and how powerful its emissions will be.