©EGILL ADALSTEINSSON/EPA/MAXPPP – epa04360686 (FILE) A file picture dated 21 May 2011 shows the eruption of the Grimsvotn volcano in the south-east of Iceland. According to the Icelandic Meteorological Office, Iceland finds itself on high alert over its Bardarbunga volcano. The Icelandic Meteorological Office said on 18 August 2014 that it raised its warning level for air traffic amid increased seismic activity at the volcano in the south east of the country. A 2010 eruption of a volcano under the Eyjafjallajokull glacier severely disrupted European air travel for several weeks after ash spewed into the atmosphere. EPA/EGILL ADALSTEINSSON