Calbuco, which erupted without warning on Wednesday, was still puffing out ash and smoke on Friday, leading airlines to cancel flights from Argentine capital Buenos Aires, some 1,400 kilometers east. Calbuco, considered one of the most dangerous along Chile's chain of around 500 active volcanoes, erupted twice in 24 hours on Wednesday and Thursday.
Chilean Volcano Huffs and Puffs
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A vehicle travels along a road at Pucon city, Chile, which was hit by ashes from Calbuco volcano, April 23, 2015
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Dogs look over a fence while standing on the ground covered in ash from Calbuco volcano in Ensenada, Chile, April 23, 2015.