San Carlos de Bariloche Rio Negro, Argentina — Part of the coast of Nahuel Huapi Lake is covered with ash from Puyehue volcano in Chile.

PHOTOGRAPH BY: Chiwi Giambirtone / REUTERS

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Paso Cardenal Samore, Chile — A close-up picture shows ash from Puyehue volcano floating in the Gol-Gol River.

PHOTOGRAPH BY: Alvaro Vidal / Associated Press

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Villa La Angostura, Argentina — People walk on a street in southern Argentina blanketed by volcanic ash from Puyehue in neighboring Chile.

PHOTOGRAPH BY: DyN / Associated Press

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Puyehue, Chile — A road sign is nearly buried in ash from Puyehue volcano.

PHOTOGRAPH BY: IAN SALAS / European Pressphoto Agency

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San Carlos de Bariloche Rio Negro, Argentina — A window is partially covered with ashes three days after the eruption of Chile's Puyehue volcano.

PHOTOGRAPH BY: FRANCISCO RAMOS MEJIA / AFP/Getty Images

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Earth orbit — A photo released by NASA shows an aerial view of the Puyehue eruption from June 4.

PHOTOGRAPH BY: MODIS Satellite / NASA/Associated Press

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Lago Ranco, Chile — Lightning flashes over the Puyehue volcano.

PHOTOGRAPH BY: Francisco Negroni / Agencia Uno

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Puyehue, Chile — A policeman walks a road covered with rocks and ash from the volcano.

PHOTOGRAPH BY: ISN SALAS / EPA

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San Carlos de Beriloche, Argentina — An Air Austral jet is stranded at San Carlos de Bariloche in Argentina's Patagonia region after being covered with ash that blew over the Andes from the volcano in neighboring Chile.

PHOTOGRAPH BY: STR / Reuters

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Rininahue, Chile — Smoke billows into the sky during an electrical storm after the eruption of the volcano Puyehue. The eruption prompted the government to evacuate 3,500 residents from the area while ash blanketed towns nearly 100 kilometers away in Argentina.

PHOTOGRAPH BY: Daniel Basualto / European Pressphoto Agency

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San Martin de Los Andes, Argentina — A man wears a surgical mask against falling ash in the mountain resort of San Martin de Los Andes in Patagonia. .

PHOTOGRAPH BY: Patricio Rodriguez / Reuters

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Chile — A Chilean air force photo shows the cloud of ash billowing from the Puyehue volcano.

PHOTOGRAPH BY: Chilean Air Force / AFP/Getty Images

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Paso Cardenal Samore, Chile — A woman examines pumice rock covering a road thear the Cardenal Samore pass between Argentina and Chile.

PHOTOGRAPH BY: IVAN ALVARADO / Reuters

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Osorno, Chile — Lightning flashes during the eruption of the Puyehue volcano.

PHOTOGRAPH BY: Ivan Alvarado / Reuters

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Santiago, Chile — A woman peers out from a shelter after being evacuated from a town threatened by the volcano.

PHOTOGRAPH BY: IVAN ALVARADO / Reuters

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Osorno, CHILE — Ash billows from the volcano. Officials said the initial eruption sent a column of gas six miles high.

PHOTOGRAPH BY: CLAUDIO SANTANA / AFP

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San Martin de Los Andes, Argentina — Rosehips in Patagonia are covered in ash from the eruption in Chile.

PHOTOGRAPH BY: Patricio Rodriguez / Reuters

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Osorno, Chile — A cloud of ash billows from Puyehue volcano in southern Chile. The volcano erupted for the first time in half a century on Saturday.

PHOTOGRAPH BY: Claudio Santana / AFP

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