Public domain
Three Coronal Holes
From the collection of NASA Image and Video Library. Free to download, adapt and use — no permission needed.
About this work
For much of this week the sun featured three substantial coronal holes (Apr. 3-6, 2018). Coronal holes appear as large dark areas which are identified with arrows in the still image. These are areas of open magnetic field from which high speed solar wind rushes out into space. This wind, if it interacts with Earth's magnetosphere, can cause aurora to appear near the poles. They are not at all uncommon.
NASA Image and Video Library’s own descriptionCredit lineThree Coronal Holes. NASA/JPL, 2018-04-16. Public domain. ID: PIA22414.
