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Planchon Peteroa.jpg
Peteroa as seen from the summit of Planchón.
Highest point
Elevation 4,107 m (13,474 ft)
Coordinates 35°14′24″S 70°34′12″W / 35.24000°S 70.57000°W / -35.24000; -70.57000Coordinates: 35°14′24″S 70°34′12″W / 35.24000°S 70.57000°W / -35.24000; -70.57000
Location Argentina-Chile
Parent range Andes
Mountain type Complex volcano
Last eruption February to June 2011[1]

Planchón-Peteroa is a complex volcano extending in a north-south direction along the border between Argentina and Chile. It consists of volcanoes of various ages with several overlapping calderas. Those include Volcán Planchón, Volcán Peteroa and Volcán Azufre.

A partial collapse of the complex about 11,500 years ago produced a major debris avalanche, which followed the course of the Teno River until reaching the Chile Central Valley.

Peteroa has a crater lake. Lagunas de Teno lies at the foot of Planchón volcano. In this area also is the Vergara International Pass.

September 6, 2010 eruption[edit]

Planchón-Peteroa Volcano erupted on September 6 followed by a stronger eruption on September 18. On September 21, the volcano erupted once again emitting a dark gray plume of ash. As winds cause volcanic ash to blow southeast into Argentina, residents there were warned by authorities to evacuate the nearby areas before Planchón-Peteroa would erupt again.

See also[edit]