Calbuco Vulcano, Llanquihue National Reserve, Los Lagos Region, Chile

The 1893-4 Calbuco eruption was one of the largest ever to take place in southern Chile, with debris ejected to distances of eight kilometres, accompanied by voluminous hot lahars. In the strong explosions of April 1917, a lava dome formed in the crater accompanied by hot lahars. Another short explosive eruption in January 1929 also included an apparent pyroclastic flow and a lava flow.
The major eruption of 1961 sent ash columns 12–15 km high, produced plumes that dispersed mainly to the south east and emitted two lava flows. There was a minor, four-hour eruption on August 26, 1972. Strong fumarolic emission from the main crater was observed on August 12, 1996.
The most recent eruption happened on April 22, 2015, followed by two smaller eruptions on April 24 and April 30. This was Calbuco's first activity since 1972.