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Villarrica volcano (Chile, 39.42 o S, 71.93 o W) is one of the most active volcanoes in the Andes. It shows persistent strombolian activity in a small lava lake situated at the bottom of the summit crater. From September to December 2000, the volcano exhibited anomalous behaviour: after a regional tectonic seismic event on 22 September, the eruption of a small volume of lava apparently...
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