The Icelandic volcano that caused worldwide air travel chaos is settling down, scientists said today, but they warned it was not yet finished.

Experts said there were still signs of activity coming from the Eyjafjallajokul volcano - such as spurts of ash or bursts of steam.

Geologist Pall Einarsson said they were also wary of declaring the emergency over because eruptions tend to wind down slowly.

Eyjafjallajokul erupted on April 14. Danger to planes from the volcanic ash plume led much of northern Europe to shut its airspace, stranding an estimated 10 million travellers worldwide.

The last time Eyjafjallajokul erupted, in 1821, activity was recorded on and off for almost two years.