2011/26: Eruption of the Puyehue Cordon-Caulle volcano on June 5th 2011, Chile. The eruption started on the 4th of June at 11 am with a major explosion around 3 pm. This last one produced a disturbing 10km ash plume for the local population and the air traffic above South America and Oceania. (Francisco Negroni -- www.flickr.com/photos/francisconegroni -- )