Solar active region AR2192

Sun’s Solar active region AR2192 produced a whopping six energetic X-class flares at the end of October, the largest recorded sunspot group of the last 24 years.

Image © Solar Dynamics Observatory/AIA, NASA



Larger image

Its most intense flare was captured on October 24 in this stunning view from the orbiting Solar Dynamics Observatory (SDO). The scene is a color combination of images made at three different wavelengths of extreme ultraviolet light; 193 angstroms shown in blue, 171 angstroms in white, and 304 angstroms in red. The emission, from highly ionized Iron and Helium atoms, traces magnetic field lines looping through the hot plasma of the Sun’s outer chromosphere and corona. Beneath, the cooler solar photosphere appears dark at extreme ultraviolet wavelengths. The exceptionally sharp composite image has been processed with a new mathematical algorithm (NAFE) that adapts to noise and brightness in extreme ultraviolet image data to reliably enhance small details.

source APOD