A column of steam and ash rises out of an erupting volcano near Eyjafjallajokull.

London - Another volcano could be about to erupt on Iceland, threatening to spew out a blanket of dust that would dwarf last year’s eruption and ground hundreds more passenger flights.

Geologists say there is a high risk of the island’s second-largest volcano Bárdarbunga erupting after an increase in the number of earthquakes around it.

Pall Einarsson, a professor of geophysics at the University of Iceland, says the increased activity provides “good reason to worry”. The sustained tremors to the north-east of the remote volcano range are the strongest recorded in recent times and there was “no doubt’ the lava was rising.

But he added that a low number of detection devices in the area make it difficult to predict exactly what will happen, and when.

Last year’s eruption of volcanos near Eyjafjallajokull, in the south of the island, caused chaos around the world as hundreds of planes were grounded by dust and ash.

The last recorded eruption of Bárdarbunga was in 1910, although experts believe a huge discharge in 1477 produced the largest lava flow of the past 10 000 years on Earth. - Daily Mail