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.
This is the same occurrence that endows certain auroras on Earth with a greenish hue. Typically, such emissions do not happen unless during significant solar events like coronal mass ejections (CMEs) or solar flares. However, faint emissions have been observed twice outside of solar storms, specifically on December 27, 2010, and December 12, 2013.