Around midday on April 24, 2015, the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite acquired this natural-color image of the ash and gas plume from Calbuco volcano in southern Chile. According to Chile’s National Geology and Mining Service (SERNAGEOMIN), tremors, ash emissions (to about 2 kilometers), and other volcanic activity are continuing, and the volcano has entered “an unstable phase.” NASA Earth Observatory image by Joshua Stevens, using MODIS data from the LANCE/EOSDIS Rapid Response team at NASA Goddard. Caption by Mike Carlowicz. Instrument(s): Terra - MODIS