This is the same phenomenon which gives some aurorae on Earth their greenish appearance. Generally, this emission does not occur except for during major solar events such as coronal mass ejections (CMEs) or solar flares. However, dim emissions have been detected twice outside of solar storms, on December 27, 2010, and December 12, 2013 respectively.
The same phenomenon that causes certain auroras on Earth to appear green also happens during major solar events like coronal mass ejections (CMEs) or solar flares. Typically, these emissions are not observed unless there is a significant solar event. However, faint emissions have been detected twice outside of solar storms—on December 27, 2010, and December 12, 2013.