Iceland volcano should calm down within few days because its producing steam and not ash, police told Reuters on Thursday. There will be no further disturbance to flights in northern Europe, it said.

The Grimsvotn volcano's eruption, however, caused less trouble to travelers because of the new airlines rules. But it has showed some alarm among the authorities on aviation safety.

The volcano is still active, but there is just steam and smoke, Hjalmar Bjorgvinsson, superintendent at the national police, told Reuters. I hope in a few days it will go to sleep again,” he added.

No airspace was closed on Thursday and there will be very little or no impact on European air traffic over the next 48 hours due to volcano ash, European air traffic agency Euro control said.

About 900 flights between Monday and Wednesday had been cancelled, the agency said.

The ash cloud from Grimsvotn rose as high as 20 km (12 miles) into the sky after the eruption.

There was very little ash or magma coming from the volcano on Thursday, Iceland's civil protection and emergency management said.

About 1,000 people have been affected by the fallout from the volcano.

More than 10 million people were affected last year when European airspace was shut down due to Eyjafjallajokull eruption, which cost airlines almost $2 billion of loss.