The Icelandic Meteorological Office has again raised its alert status for the risk of atmospheric contamination by volcanic ash.

The measure comes as a result of increased seismic activity near the Bárðarbunga and Trölladyngja volcanoes in central Iceland, both of which are on the northern edge of the Vatnajökul glacial region.

Eurocontrol's Network Operations Portal (NOP) has published a release stating: "The aviation alert status of the Icelandic volcano Bárðarbunga has been changed to code orange (lava eruption in progress). At the moment there is no ash cloud observed."

The NOP adds that Icelandic authorities have established a danger area from the surface up to 5,000ft in the vicinity of the volcanoes.

For a summary of the significance of Icelandic seismic activity for European aviation, head to David Learmount’s blog.