Photo Gallery: Chile Volcano Erupts

The volcano is located 500 miles south of Santiago, Chile, but ash has spread to neighboring Argentina.

A cloud of ash from the volcano billows over Osorno in southern Chile on Sunday. The first eruption in half a century prompted the evacuations of thousands of people.

A boy on a bicycle pauses Monday to look at a plume of smoke and ash emerging from the volcano.

Ash and lightning sparked by the eruption make for a dramatic display in the skies. The eruption has disrupted international air travel.

Stranded passengers line up at an Aerolineas Argentinas desk on Tuesday, June 7. But Tuesday afternoon the airline said it had ceased all domestic and international flights until further notice.

A walk through Cardinal Samore Pass, the border between Chile and Argentina, required masks to protect against volcanic ash.