A general view of Chilean Calbuco volcano from Puerto Montt, located at 1000 km south of Santiago, Chile, on April 22, 2015. Due to the eruption of the volcano with a smoke column 20 km high, authorities declared a red alert and ordered the evacuation of around 1500 inhabitants of Ensenada, Alerce, Colonia Rio Sur and Correntoso towns. (ALEX VIDAL BRECAS / EPA)
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