This volcano is known as Eyjafjallajokull is located in Iceland had its first eruption on March 20, 2010, but its eruption in April was a lot worse, costing their airline industry over $1 billion. It was a new and stronger eruption as the volcano erupted though a glacial ice cap, tossing volcanic ash 11 km into the atmosphere. It was high enough for the ash to be carried for thousands of kilometers, but even worse is that the winds started blowing towards both the east and south sending the volcanic ash towards the most crowded airspace in Europe.

http://content.time.com/time/specials/packages/article/0,28804,2014572_2014574_2014604,00.html