Puyehue Volcano Eruption, Andes, Chile

A new eruption started on June 4, 2011. As of 4 June, 3,500 people were evacuated in nearby areas, while the ash cloud reached the city of Bariloche, in Argentina, where the local airport was closed. At approximately 16:30 PM local time, Neuquén's Airport further East in Argentina was also closed due to the ash cloud.
Geothermal activity and exploration
Cordón Caulle is a major area of geothermal activity, as manifested by the several hot springs, boiling springs, solfataras and fumaroles that develop on it. The geothermal system in Cordón Caulle consists of a vapour dominated system overlain by a more superficial steam heated aquifer. The temperatures of the vapour systems range from 260–340 °C and 150–180 °C for the aquifer. The uppermost part of the geothermal system, at 1500–2000 m (4,921–6,562 ft), is characterized by fumaroles and acid-sulfate springs. Cordón Caulle is considered one of the main sites of geothermal exploration in Chile.