

The Northern Lights are seen above the ash plume of Iceland's Eyjafjallajokull volcano on April 23. Iceland's volcanic eruption was spewing far less ash on Thursday and the plume of smoke was low, but a change of wind direction meant Iceland's airports were now set to close for the first time. Ingolfur Juliusson/Reuters
The Northern Lights are seen through a valley leading away from Iceland's Eyjafjallajokull volcano on April 22. Lucas Jackson/Reuters
The Northern Lights are seen above the ash plume of Iceland's Eyjafjallajokull volcano in the evening April 22. Lucas Jackson/Reuters
Lava and ash explode out of the caldera of Iceland's Eyjafjallajokull volcano April 22. Lucas Jackson/Reuters
Activity is seen from the volcano in southern Iceland's Eyjafjallajokull glacier on April 21. Geologists continued to keep a close watch on the Iceland volcano Eyjafjallajokull on Wednesday, as observers noticed a change in the eruption pattern. Instead of thick black smoke, the plume was almost white, and more like steam than black ash. Brynjar Gauti/AP
A tourist walks away after looking at Iceland's Eyjafjallajokull volcano on April 22. Lucas Jackson/Reuters
Wet volcanic ash covers a children's slide on April 22 on the Onundarhorn Dairy Farm, south of the Eyjafjallajokull glacier in Hvolsvollur, Iceland. Carolyn Kaster/AP
A plume of ash from the volcano under the Eyjafjallajokull glacier covers the farm of Pall Eggert Olafsson, in Thorvaldseyri, Iceland. Brynjar Gauti/AP
Lava and ash explode out of the caldera of Iceland's Eyjafjallajokull volcano April 22. Lucas Jackson/Reuters
People look at Iceland's Eyjafjallajokull volcano on April 22. Lucas Jackson/Reuters
Eyjafjallajokull Volcano in Iceland is still causing travel chaos across Europe as many flights remain grounded.
Eyjafjallajokull Volcano continues to erupt and spew a large column of smoke and ash into the air.
A member of the German Air Traffic Control center crisis management group points at a map showing the estimated size and direction of the volcanic ash cloud over Europe, near Frankfurt, Germany, on April 20. The Eurocontrol air traffic agency in Brussels said it expects 55 to 60 percent of flights over Europe to go ahead Tuesday, a marked improvement over the last few days.
Ground staff secure a plastic protective cover on the engines of an aircraft at Belfast City Airport in Northern Ireland, on April 16.
This aerial photo shows a plume of ash rising from the volcano in southern Iceland's Eyjafjallajokull glacier, on April 19. Scientists say because this volcano is located below a glacial ice cap, magma is being cooled quickly, causing explosions and plumes of grit that can be catastrophic to plane engines, depending on prevailing winds.
This picture, taken on April 15 from a helicopter, shows part of a dark cloud of smoke coming from a crater of an Icelandic volcano in eruption. The eruption fired ash across northern Europe, forcing the closure of huge swaths of international airspace.
Smoke billows from an erupting volcano by the Eyjafjallajokull glacier on April 14. Iceland's second volcanic eruption in less than a month melted part of a glacier and caused heavy flooding, forcing up to 800 people to evacuate and grounding flights.
A departure board at Athens International Airport is pictured through a metal advertising placard on April 19. More than 100 destinations from Athens were canceled due to the Icelandic volcanic ash cloud which has covered large parts of Europe for the past four days.
A NASA/GSFC handout dated April 17 provides a satellite image made by MODIS (Moderate Resolution Imaging Spectroradiometer) on the ash cloud caused by eruption of Eyjaffjalla volcano over Iceland.
Huw Thomas, of Britain, eats his breakfast in his cot at John F. Kennedy International Airport in New York, on April 19. Thomas and his family were originally supposed to fly back to England from a vacation on April 16, but now they are unsure when they'll be able to return home.
A picture taken through a helicopter window on April 15, shows smoke coming from a crater of an Icelandic volcano in eruption.
Lava flows from a volcano in Eyjafjallajokul April 17. The Iceland volcano that is spewing ash into the air and wreaking havoc on flights across Europe appeared to be easing up on Saturday but could continue to erupt for days or even months to come, officials said. Lucas Jackson/Reuters
The volcano in southern Iceland's Eyjafjallajokull glacier sends ash into the air just prior to sunset on April 16. Thick drifts of volcanic ash blanketed parts of rural Iceland on Friday as a vast, invisible plume of grit drifted over Europe, emptying the skies of planes and sending hundreds of thousands in search of hotel rooms, train tickets, or rental cars. Brynjar Gauti/AP
Smoke billows from a volcano in Eyjafjallajokull April 16. Large parts of Europe enforced no-fly rulings for a third day on Saturday because of a huge ash cloud from an Icelandic volcano that has caused the worst air travel chaos since the Sept. 11 terrorist attacks. Jon Gustafsson/Reuters
Farmers team up to rescue cattle from exposure to the toxic volcanic ash at a farm in Nupur, Iceland, as the volcano in southern Iceland's Eyjafjallajokull glacier sends ash into the air Saturday, April 17, 2010. Iceland's volcano, which has kept much of Europe land-bound, is far from finished spitting out its grit and offered up new mini-eruptions Saturday that raise concerns about longer-term damage to world air travel and trade. Brynjar Gauti/AP
Wearing a mask and glasses against the smoke, dairy farmer Berglind Hilmarsdottir from Nupur, Iceland, looks for cattle lost in ash clouds, Saturday, April 17, 2010. The volcano in southern Iceland's Eyjafjallajokull glacier continued to send ash into the air Sunday. The Icelandic volcano that has kept much of Europe land-bound is far from finished spitting out its grit, and offered up new mini-eruptions Saturday that raise concerns about longer-term damage to world air travel and trade. Brynjar Gauti/AP
Volcanic ash is seen over Iceland's main ring road near Skogar, east of the eruption, as the volcano in southern Iceland's Eyjafjallajokull glacier sends ash into the air on April 17. Brynjar Gauti/AP
Lightning streaks across the sky as lava flows from a volcano in the Eyjafjallajokul glacier on April 17. Lucas Jackson/Reuters
A film crew working for National Geographic set up on southern Iceland's Eyjafjallajokull glacier after landing on the glacier, close to the volcanic eruption, on April 18. Scientists say that because the volcano is situated below the glacial ice cap, magma is being cooled quickly, causing explosions and plumes of grit. The eruption is ongoing and forecasters have predicted that light prevailing winds in Europe mean that the situation for air travel is unlikely to change in the coming days. Reynir Petursson/Helicopter.is/AP
Farmer Bjarni Thorvaldsson works to clean off volcanic ash that accumulated on a barn roof from an erupting volcano near the Eyjafjallajokull glacier on April 18. Lucas Jackson/Reuters
An aerial view of the glacier where the flood water (lower right) was flowing into the Markarfljot River from the glacier, volcanic eruption and the cracks in the Eyjafjallajokull glacier on April 17. The volcano in southern Iceland's Eyjafjallajokull glacier continued to send ash into the air Sunday. Brynjar Gauti/AP
The empty Copenhagen International Airport in Kastrup, Denmark, is closed, as seen on April 17 as a cloud of volcanic ash from the eruption under the Eyjafjallajokull glacier in Iceland, once again forced the cancellation of all flights in and out of Denmark. Thorkild Amdi/Polfoto/AP
Smoke and lava are seen as a volcano erupts in Iceland on April 17. The volcano that is spewing ash into the air and wreaking havoc on flights across Europe appeared to be easing up on Saturday but could continue to erupt for days or even months to come, officials said. Lucas Jackson/Reuters
A little girl rests on her suitcase in a terminal at Germany's largest airport in Frankfurt, Germany, on April 18, 2010. The airport was closed due to the ash cloud coming from the volcano under the Eyjafjallajokull glacier in Iceland. The airport will stay closed at least until Sunday evening. Michael Probst/AP
Travelers at Los Angeles International Airport bound for Frankfurt, Germany, react as their tour guide informs them that it will be several days before their departure due to ash from a volcano in Iceland which has grounded flights to Europe. They were scheduled to fly Lufthansa on April 17. Christine Cotter/AP
This aerial image shows the crater at the summit of the volcano in southern Iceland's Eyjafjallajokull glacier on April 17. A lingering volcanic ash plume forced extended no-fly restrictions over much of Europe Saturday, as Icelandic scientists warned that volcanic activity had increased and showed no sign of abating. Arnar Thorisson/Helicopter.is/AP
Farmer Thorarinn Olafsson tries to lure his horses back to the stable as a cloud of black ash looms overhead in Drangshlid, Iceland, on April 17. Ingolfur Juliusson/Reuters
The volcano in southern Iceland's Eyjafjallajokull glacier sends ash into the air on April 17. The Iceland volcano has kept much of Europe land-bound and is far from finished spitting out its grit and offered up new mini-eruptions Saturday. Brynjar Gauti/AP
Smoke and steam rises from the volcano under the Eyjafjallajokull glacier in Iceland on April 14. The volcano erupted for the second time in less than a month earlier this week, melting ice, shooting smoke and steam into the air, and forcing hundreds of people to flee rising floodwaters. A huge ash cloud from the volcano caused further air travel chaos across Europe on Friday on a scale not seen since the Sept. 11 attacks, leaving hundreds of thousands of passengers stranded. About 17,000 flights were expected to be canceled on Friday due to the dangers posed by clouds of volcanic ash from Iceland, aviation officials said, with airports in Britain, France, Germany, and across Europe closed until at least Saturday. Icelandic Coastguard/AP
Clouds of smoke and steam are seen hanging over the volcano under the Eyjafjallajokull glacier on April 14. Jon Gustafsson/AP
Floodwaters rise after the volcano under the Eyjafjallajokull glacier erupted. Emergency officials and scientists said the eruption under the ice cap was 10 to 20 times more powerful than the one last month, and carried a greater risk for widespread flooding. Icelandic Coastguard/AP
A man looks at a broken section of Iceland's main coastal road near Reykjavik on April 14 after melt water from the volcanic eruption caused river levels to rise by up to 10 feet. Brynjar Gauti/AP
Travelers stand in line at a ticket counter at German railway Deutsche Bahn AG at Frankfurt airport on April 16. A huge ash cloud from an Icelandic volcano caused further air travel chaos across Europe on Friday on a scale not seen since the September 11 attacks, leaving hundreds of thousands of passengers stranded. About 17,000 flights were expected to be canceled on Friday due to the dangers posed by clouds of volcanic ash from Iceland, aviation officials said, with airports in Britain, France, Germany, and across Europe closed until at least Saturday. Ralph Orlowski/Reuters
A passenger points to a flight information screen covered with cancellations at Roissy Charles de Gaulle Airport on April 16 as hundreds of commercial flights across northern Europe are canceled due to the drifting plume of ash from the Iceland volcano. Christophe Ena/AP
On April 14, floodwaters rise after an eruption from the volcano under the Eyjafjallajokull glacier in Iceland. Icelandic Coastguard/AP
Smoke and steam from the volcano under the Eyjafjallajokull glacier in Iceland on April 15. Brynjar Gaudi/AP
Smoke billows from a volcano in Eyjafjallajokull on April 14. A volcanic eruption in Iceland spewed black smoke and white steam into the air on Wednesday and partly melted a glacier, setting off a major flood that threatened to damage roads and bridges. Ingolfur Juliusson/Reuters
In this image made available by the Icelandic Coast Guard on April 14, smoke and steam rise from the volcano under the Eyjafjallajokull glacier in Iceland. The volcano erupted for the second time in less than a month, melting ice, shooting smoke and steam into the air and forcing hundreds of people to flee rising floodwaters. Authorities evacuated 800 residents from around the glacier as rivers rose by up to 10 feet (3 meters). Emergency officials and scientists said the eruption under the ice cap was 10 to 20 times more powerful than one last month, and carried a much greater risk of widespread flooding. Icelandic Coastguard/AP
Melted ice spews from the crater of the volcano under the Eyjafjallajokull glacier in Iceland on April 14. RUV TV/APTN/AP
A youth lies on a mattress at the South Iceland Care Center after hundreds of residents were forced to leave their homes by a volcanic eruption underneath a glacier in Hvolsvollur, Iceland, on April 14. Brynjar Gauti/AP
Highway 1, the main road that goes around Iceland, is cut off by a flood caused by a volcanic eruption at the Eyjafjallajokull glacier on April 14. Ingolfu Juliusson/Reuters
A volcanic crater under the Eyjafjallajokull glacier in Iceland is seen on April 14 after the volcano erupted for the second time in less than a month. RUV TV/APTN/AP
A volcanic crater under the Eyjafjallajokull glacier in Iceland is seen in this image from the Icelandic Coast Guard. Emergency officials and scientists said the eruption under the ice cap was 10 to 20 times more powerful than one last month, and carried a much greater risk of widespread flooding. Icelandic Coastguard/AP
Smoke rises from the crater of the volcano under the Eyjafjallajokull glacier in Iceland, which erupted on April 14, melting ice and shooting smoke and steam into the air. CH2 TV/APTN/AP
Molten lava spews from a rupture near the Eyjafjalajokull glacier in Iceland as a volcano erupts early on March 21. Some hundreds of people were evacuated from a small village in southern Iceland after the first major eruption in the area in nearly 200 years. Ragnar Axelsson/AP
A glow appears on the skyline in the region of Eyjafjallajokull glacier as a volcano erupts on March 21. Halldor Kolebins/AFP/Getty Images/Newscom
Lava spews out of a mountain on March 21 in Iceland. The small eruption could set off a larger volcano in the near future. Some 500 people were forced to flee their homes over the weekend because of the volcano. Fior Kjartansson/AFP/Getty Images/Newscom
Smoke and ash are seen spewing from the mountain in the region of the Eyjafjallajokull glacier in Iceland on March 21. Fior Kjartansson/AFP/Getty Images/Newscom
Lava and smoke are seen coming out of a mountain in Hvolsvöllur, Iceland, on March 21. Fior Kjartansson/AFP/Getty Images/Newscom
A volcano on the Eyjafjallajokull glacier erupts early on March 21. Ragnar Axelsson/Reuters
Lava spews into the air during a small volcanic eruption in Iceland on March 21. Fior Kjartansson/AFP/Getty Images/Newscom
Early on March 21, a glow is seen on the skyline in Iceland as a volcano near the Eyjafjallajokull glacier erupts. Halldor Kolbeins/AFP/Getty Images/Newscom