Iceland Volcanic Eruption

A man (left) and a woman (right) watches a flight information board at Keflavik airport, Keflavik, Iceland Sunday May 22, 2011 as Iceland closed its main international airport and canceled domestic flights as a powerful volcanic eruption sent a plume of ash, smoke and steam 12 miles (20 kilometers) into the air. The eruption was far larger than one a year ago that caused international travel chaos but scientists said it was unlikely to have the same widespread effect. (AP Photo/Brynjar Gauti)

People wait with their luggage at Keflavik airport, Keflavik, Iceland Sunday May 22, 2011 as Iceland closed its main international airport and canceled domestic flights as a powerful volcanic eruption sent a plume of ash, smoke and steam 12 miles (20 kilometers) into the air. The eruption was far larger than one a year ago that caused international travel chaos but scientists said it was unlikely to have the same widespread effect. (AP Photo/Brynjar Gauti)

A deserted check in area is seen at Keflavik airport, Keflavik, Iceland Sunday May 22, 2011 as Iceland closed its main international airport and canceled domestic flights as a powerful volcanic eruption sent a plume of ash, smoke and steam 12 miles (20 kilometers) into the air. The eruption was far larger than one a year ago that caused international travel chaos but scientists said it was unlikely to have the same widespread effect. (AP Photo/Brynjar Gauti)

A deserted check in area is seen at Keflavik airport, Keflavik, Iceland Sunday May 22, 2011 as Iceland closed its main international airport and canceled domestic flights as a powerful volcanic eruption sent a plume of ash, smoke and steam 12 miles (20 kilometers) into the air. The eruption was far larger than one a year ago that caused international travel chaos but scientists said it was unlikely to have the same widespread effect. (AP Photo/Brynjar Gauti)

A deserted check in area is seen at Keflavik airport, Keflavik, Iceland Sunday May 22, 2011 as Iceland closed its main international airport and canceled domestic flights as a powerful volcanic eruption sent a plume of ash, smoke and steam 12 miles (20 kilometers) into the air. The eruption was far larger than one a year ago that caused international travel chaos but scientists said it was unlikely to have the same widespread effect. (AP Photo/Brynjar Gauti)

A flight information board marks flights as canceled at Keflavik airport, Keflavik, Iceland Sunday May 22, 2011 as Iceland closed its main international airport and canceled domestic flights as a powerful volcanic eruption sent a plume of ash, smoke and steam 12 miles (20 kilometers) into the air. The eruption was far larger than one a year ago that caused international travel chaos but scientists said it was unlikely to have the same widespread effect. (AP Photo/Brynjar Gauti)

In this photo taken on Saturday, May 21, 2011, smoke plumes from the Grimsvotn volcano, which lies under the Vatnajokull glacier, about 120 miles, (200 kilometers) east of the capital, Rejkjavik, which began erupting Saturday for the first time since 2004. Iceland closed its main international airport and canceled domestic flights Sunday as a powerful volcanic eruption sent a plume of ash, smoke and steam 12 miles (20 kilometers) into the air. (AP Photo/Jon Gustafsson) ICELAND OUT

In this photo taken on Saturday, May 21, 2011, smoke plumes from the Grimsvotn volcano, which lies under the Vatnajokull glacier, about 120 miles, (200 kilometers) east of the capital, Rejkjavik, which began erupting Saturday for the first time since 2004. Iceland closed its main international airport and canceled domestic flights Sunday as a powerful volcanic eruption sent a plume of ash, smoke and steam 12 miles (20 kilometers) into the air. (AP Photo, Jon Gustafsson) ICELAND OUT

In this photo taken on Saturday, May 21, 2011, smoke plumes from the Grimsvotn volcano, which lies under the Vatnajokull glacier, about 120 miles, (200 kilometers) east of the capital, Rejkjavik, which began erupting Saturday for the first time since 2004. Iceland closed its main international airport and canceled domestic flights Sunday as a powerful volcanic eruption sent a plume of ash, smoke and steam 12 miles (20 kilometers) into the air. (AP Photo, Jon Gustafsson) ICELAND OUT

Smoke rises from the Grimsvotn volcano, Saturday, May 21, 2011 in Reykjavik, Iceland. Iceland's most active volcano has started erupting, scientists said Saturday just over a year after another eruption on the North Atlantic island shut down European air traffic for days. Iceland's Meteorological Office confirmed that an eruption had begun at the Grimsvotn volcano, accompanied by a series of small earthquakes. (AP Photo/Halldora Kristin Unnarsdottir)

Smoke rises from the Grimsvotn volcano, Saturday, May 21, 2011 in Reykjavik, Iceland. Iceland's most active volcano has started erupting, scientists said Saturday just over a year after another eruption on the North Atlantic island shut down European air traffic for days. Iceland's Meteorological Office confirmed that an eruption had begun at the Grimsvotn volcano, accompanied by a series of small earthquakes. (AP Photo/Halldora Kristen Unnarsdottir)

In this image taken from amateur video, smoke from the Grimsvotn volcano, Iceland is seen from a plane Saturday, May 21, 2011. Iceland's most active volcano has started erupting, scientists said Saturday, just over a year after another eruption on the North Atlantic island shut down European air traffic for days, but the impact of this volcanic eruption is not yet known. (AP Photo/Amateur video via APTN) ICELAND OUT, TV OUT