NASA image courtesy Jeff Schmaltz
LANCE/EOSDIS MODIS Rapid Response Team, GSFC.
Caption by Adam Voiland.

...emit gas and ash. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite captured these natural-color (top) and false-color (bottom) views of the continuing eruption on November 1, 2012. Though the plume is difficult to detect in the true-color image, it shows up clearly in false-color because of the different combination of bands used to create the two images. In the false-color image, snow and ice appears bright red and vegetation looks green.