Red colors indicate the highest intensity of incoming particles, blue represents the lowest.
FUV - The Far Ultraviolet Imager instrument records the aurora during a small space storm. Brighter yellow corresponds to brighter auroral light. The view is towards the Earth's night side, and the detailed and highly turbulent region reveals storm activity in the magnetic field surrounding Earth. The helium atmosphere extends to about 2 - 3 times the size of the Earth. Irregularities at the fringe of the image, such as the upper left, indicate magnetic storm activity.