Eyjafjallajokull's Ash Cloud Closes European Airspace
CONFIRMED88% CONFIDENCEThe closure is dated as a span: the second phase from 14 April "created an ash cloud that led to the closure of most of the European IFR airspace from 15 until 20 April 2010". The pin covers 15-20 April, so its exclusive end is 21 April.[1]
The volcano's second eruptive phase threw ash into the jet stream and about 20 countries shut their airspace to commercial jets. Roughly 10 million travellers were stranded in the worst air-travel disruption since the Second World War.