Divers of the Prefectura Naval Argentina inspect the Rio Limay, covered with pumice and ash from Chile's Puyehue-Cordon Caulle volcano chain at the mountain resort of San Carlos de Bariloche in Argentina, on June 16, 2011. #

Ash and gases billow through low clouds after an eruption of the Puyehue-Cordon Caulle volcano in Chile, seen from Cardenal Samore, Chile, near the border with Argentina, on Wednesday June 15, 2011. #

Pumice floats on a mountain lake (top right) east of the Puyehue volcano, seen in this natural-color satellite image, taken on June 14, 2011. Parts of the lake not covered with pumice are colored aqua by the fine ash suspended in the water. Along the southern edge of the image is the ash plume, evidence of the continuing eruption which started on June 4, 2011. This image was acquired by the Advanced Land Imager (ALI) aboard the Earth Observing-1 (EO-1) satellite. #

A man wearing a protective mask walks on a street blanketed in volcanic ash from Chile's Puyehue-Cordon Caulle volcano in Villa La Angostura in southern Argentina, on Tuesday June 14, 2011. #

Police officers watch the warm water of the overflowing Nilahue River after the eruption of the Puyehue-Cordon Caulle volcano in Los Venados, Chile, on Thursday, June 9, 2011. #

Argentina's border police and rescue workers remove ash covered trees from a stream that leads to a lake to avoid blockage of the water passage in Villa La Angostura in southern Argentina, on Wednesday June 15, 2011. #

A detailed picture shows volcanic ash and pumice stones from the Puyehue-Cordon Caulle volcano floating in a patch of water in the Gol-Gol River, near the Chile-Argentina border road Cardenal Samore, over 500 miles south of Santiago, Chile, on Tuesday June 7, 2011. #

Dead fish float among pumice stones in the Nilahue River after the eruption of the Puyehue-Cordon Caulle volcano in Rininahue, southern Chile, on Wednesday, June 8, 2011. #

The billowing ash plume of Chile's Puyehue-Cordon Caulle volcano rises through the clouds after an eruption, seen from Cardenal Samore, in southern Chile, on Wednesday June 8, 2011. #

The MODIS instrument on NASA's Terra satellite captured a visible image of the ash plume from the eruption of Chile's Puyehue-Cordon Caulle volcano chain spreading across South America on June 13 , 2011. The wind shifted from the day before and was now blowing from the west and southwest, pushing the plume east and northeast. #

A concentrated plume of ash from Chile's Puyehue volcano appears a world away (horizontal strip across middle), suspended in the atmosphere between 20,000 and 35,000 feet (6 to 11 kilometers) above above Australia and New Zealand. The Moderate Resolution Imaging Spectroradiometer (MODIS) on the Aqua satellite acquired this image on June 13, 2011. #

A road is blanketed in volcanic ash from Chile's Puyehue-Cordon Caulle volcano in Villa La Angostura in southern Argentina, on Tuesday June 14, 2011. The sign reads in Spanish; "Attention, children playing." #

A man stands on the banks of the ash-covered lake Nahuel Huapi, near San Carlos de Bariloche, Rio Negro, Argentina, on June 8, 2011, four days after the eruption of Chile's Puyehue volcano. #

A view of the Nahuel Huapi Lake and a part of its coast covered with ash and pumice released by a volcano in the Puyehue-Cordon Caulle volcano chain, in the Argentine resort city of San Carlos de Bariloche, on June 7, 2011. #

An ash plume billows through the clouds after an eruption of the Puyehue-Cordon Caulle volcano in Chile, seen from Cardenal Samore, Chile, on Wednesday June 15, 2011. #

A vehicle belonging to Argentina's border police (Gendarmeria Nacional) drives on a mountain road covered by ash from Chile's Puyehue-Cordon Caulle volcano chain, in Villa Llanquin hamlet, near San Carlos de Bariloche, on June 17, 2011. #

A passenger leans on a windowsill at Buenos Aires' airport, June 14, 2011. The volcano in the Puyehue-Cordon Caulle chain in Chile has been erupting for 10 days, throwing air travel in South America into chaos, as it spewed ash high into the atmosphere causing officials in Argentina to suspend most national and international flights. #

A view of the Gol Gol river with its surface covered by floating pumice and volcanic ash, near the Puyehue volcano, close to Osorno, 870 km south of Santiago on June 7, 2011. #

A cat walks across ash-covered ground near Chile's Puyehue-Cordon Caulle volcano chain at the mountain resort San Martin de Los Andes in Argentina, on June 13, 2011. #

Cows stand on the bank of Nahuel Huapi Lake, blanketed with ash from Chile's Puyehue-Cordon Caulle volcano, at Villa La Angostura in southern Argentina, on Thursday June 16, 2011. #

Youths skateboard on a street blanketed in volcanic ash from Chile's Puyehue-Cordon Caulle volcano in San Carlos de Bariloche in southern Argentina, on Saturday June 11, 2011. #

Pumice and ash from the Puyehue volcano cover the shore and lake water at Paso Cardenal Samore along the border between Argentina and Chile, in San Carlos de Bariloche, on June 12, 2011. #

Two people stand look out from the usually rocky lake shore, at the ash covered Nahuel Huapi lake, in San Carlos de Bariloche, southern Argentina, on Tuesday June 7, 2011. #

A diver of the Prefectura Naval Argentina inspects the Rio Limay covered with pumice and ash from Chile's Puyehue-Cordon Caulle volcano chain at the mountain resort of San Carlos de Bariloche in Argentina's Patagonia, on June 16, 2011. #