Aviation officials are on red alert after two volcanoes erupted, one in Iceland and the other in Papua New Guinea.
The Icelandic Met Office raised its aviation warning level regarding the Bardarbunga volcano to red after an eruption began overnight (August 28).
Scientists said a fissure eruption 0.6 miles long started in a lava field north of the Vatnajokull glacier.
Icelandic Air Traffic Control has closed the airspace above the eruption up to a height of 5,000ft. The authority has also published a notice to airmen on the danger area.
The UK Met Office has confirmed that the eruption is not emitting ash into the upper atmosphere.
More serious disruption is taking place in Papua New Guinea, leading some airlines to change their flight paths.
Mount Tavurvur, on East New Britain Island, erupted early this morning (August 29).
Airlines including Qantas have diverted to avoid the ash cloud over Rabaul in eastern Papua New Guinea. However, this has only added a few minutes to scheduled flight times.