The Last erupted in 1972, the Calbuco volcano in southern Chile considered one of the top three most potentially dangerous of Chile’s 90 active volcanoes. It has had at least 10 eruptions since 1837. The most recent eruption was April 22, 2015. It was the first eruption of the stratovolcano in 42 years; results in huge ash cloud over mountainous area in south of Chile. The amazing footage from the area shows a huge column of lava and ash being sent several kilometers into the air.