Siim Kallas, Vice-President of the EC in charge of Transport, gave a press conference following the disruption announced in the air traffic a few days after the eruption of the Grimsvötn volcano, in Iceland. Siim Kallas' announcement was meant to be reassuring: the magnitude of the eruption of Grimsvötn is lower than the Eyjafjallajökull volcano, which erupted a year earlier. One year after the Eyjafjallajökull eruption in April 2010, a wide range of follow up measures have been taken – as agreed by ministers at the Transport Council of May 4 2010 on the basis of proposals by the Commission – at international, EU and national level to improve crisis preparedness in aviation, particularly in relation to volcanic ash.