This natural-color image from the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite shows the thick, brown ash plume from the June 4, 2011 eruption of the Puyehue-Cordón Caulle Volcano Complex in Chile. The plume is easily identified as it towers over the bright white clouds in this scene.
NASA image by Jeff Schmaltz, MODIS Rapid Response Team, NASA-GSFC. The original image and detailed caption can be found on the NASA Earth Observatory.