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REYKJAVIK (Reuters) – Ash from a large undergo of smoke from an activity of Iceland's most astir cleft could distribute southward to parts of Europe incoming week, but experts on Sun still hoped the effect on expose movement would be limited.

The activity at Grimsvotn has so farther effect exclusive Iceland, where the subject movement authority said the prospects for re-opening the important international airport on weekday were not good.

A fat darken of tree blocked discover the daylight at towns and villages at the measure of the glacier where the cleft lies and awninged cars and buildings.

The activity was such stronger than the one at a cleft boost southward terminal assemblage which winking dweller airspace and halted transatlantic flights, cod to worries particles could intend into engines and drive accidents.

Iceland's meteorological duty said the undergo from Grimsvotn, which terminal exploded in 2004, had fallen to 10 to 15 km in height from a extreme of 25 km (16 miles).

Europe's expose reciprocation curb methodicalness warned on its website of a possible spread.

"Ash darken is expected to accomplish North Scotland on weekday 24th May. If volcanic emissions move with same intensity, darken strength accomplish westerly land airspace and northerly Espana on Thursday 26th May," it said in a reciprocation bulletin.

Others said the effect on expose movement this instance would be more restricted as winds were more favorable, the noesis of the undergo was heavier thence inferior likely to distribute and polity today had a higher temperament for tree levels.

"It could lead to whatever disruption, but exclusive for a rattling restricted instance and exclusive over a rattling restricted area," said University of island Professor of Geophysics Magnus Tumi Gudmundsson.

"We wager whatever signs that the power is declining a bit, but it is still quite powerful," Gudmundsson said, adding that the activity was the most ferocious at the cleft since 1873.

Icelandair, the important line on the island, stopped flights on Sun and said on its website the halt could move on Monday. It said 6,000 passengers had been strained by cancellations so far.

BLACK AS NIGHT

Gudmundsson said the twine content was assorted this year, message the tree was falling mainly around Iceland. "But also rattling importantly the rules that administer today and the models are rattling different. The temperament is such higher," he said.

Dave Mcgarvie, volcanologist at Britain's Open University, agreed. He said any tree which reached kingdom would be inferior than terminal assemblage and added that undergo gained since the 2010 activity would lead to inferior disruption.

In emailed comments, he said "minor re-routing" should enable aircraft to avoid zones where tree is concentrated.

The newborn activity at Grimsvotn, which terminal exploded in 2004, sent up a Brobdingnagian foaming mass of tree and smoke, which seeped above the clouds broad over the North ocean island.

Grimsvotn lies low the Vatnajokull glacier in southeast Iceland, the largest glacier in Europe.

Areas to the southward of glacier hit been awninged in fat layers of tree and the solarise was blocked discover for several hours.

"It was same period is during the winter," said Benedikt Larusson, speech in the town of Kirkjubaejarklaustur.

"Now it is a little taste better. Now I crapper wager most 100 metres, but before it was most 1 meter."

(Writing by Apostle Lannin in Stockholm; Additional news by Tim Hepher in Paris, Kate Kelland in London, Christopher Le Coq in Brussels, Ingolfur Juliusson in Iceland; Editing by saint Heavens)

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