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Aerial view of the city of Pucon, some 800 km south of Santiago, with the Villarrica volcano on the background showing no visible signs of activity whatsoever just a couple of hours after it erupted on March 4, 2015. The Villarrica erupted early Tuesday, spewing fiery plumes of lava into the night sky and forcing the evacuation of some 3,600 people in nearby towns. In its first major eruption in 15 years, the Villarrica volcano, prompted authorities to declare a red alert, the National Emergency Office said. But within about seven hours the eruption calmed, and there were no longer any visible signs of activity. AFP PHOTO/MARTIN BERNETTI (Photo credit should read MARTIN BERNETTI/AFP/Getty Images)

Aerial view of the city of Pucon, some 800 km south of Santiago,  with the Villarrica volcano on the background showing no visible signs of activity whatsoever just a couple of hours after it erupted on March 4, 2015. The Villarrica erupted early Tuesday, spewing fiery plumes of lava into the night sky and forcing the evacuation of some 3,600 people in nearby towns. In its first major eruption in 15 years, the Villarrica volcano, prompted authorities to declare a red alert, the National Emergency Office said. But within about seven hours the eruption calmed, and there were no longer any visible signs of activity. AFP PHOTO/MARTIN BERNETTI        (Photo credit should read MARTIN BERNETTI/AFP/Getty Images)