An unexpected explosive eruptive phase began at the Eyjafjallajökull volcano in Iceland on April 14, 2010. The EUropean Aerosol Research LIdar NETwork (EARLINET) performed almost continuous measurements, beginning on 15 April 2010, in order to record at the continental scale the evolution of the volcanic cloud generated by the eruption.
An intensive measurement campaign with the multiwavelegth Raman lidar was performed at Bucharest lidar station during the Eyjafjallajökull eruption in 2010. Data were reported regurarly to EARLINET. Particular measurements were analyzed to assess the volcanic ash' optical and microphysical properties.