http://www.newsweek.com/sunspot-visible-naked-eye-large-four-earths-1774426

One of the sunspots facing the Earth is now so large that it can be seen with the naked eye—with proper viewing protection, of course.

The sunspot, AR3190, is around four Earths in diameter, according to an infographic on SpaceWeather.com made by Bum-Suk Yeom from Iksan, South Korea, and is twice as large as any of the other sunspots currently facing in our direction.