This is an extreme ultraviolet image of NOAA Active Region 1283, as seen by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory. The region in this image consists of two coronal loops embedded within the same coronal magnetic arcade. Rekha Jain and collaborators observed these loops oscillate while a wavefront, plotted on top of the image in white, passed through them. The oscillations were triggered by a nearby solar flare, and studying them can give us information about the properties of the coronal loops that we wouldn’t otherwise be able to measure. For more information and the original image, see the paper below.
Citation:
Rekha Jain et al. 2015 ApJ 804 L19 doi:10.1088/2041-8205/804/1/L19.