The Grímsvötn volcano in southeast Iceland, which had been dormant since 2004, started erupting in the evening of 21 May. As a consequence, the country’s airspace has been closed. Satellite measurements offer an excellent means to follow the spread, extension, concentration and movement of volcanic plumes. To this end, ESA has developed dedicated services to provide fast alerts on volcanic eruptions to support VAACs within the Support to Aviation Control Service project. Read More