The Grimsvötn eruption in Iceland began its eruption on May 21, 2011 with the injection of considerable ash into the navigable airspace to the east. Excellent photographs can be found at the Icelandic Met Office.  Grimsvötn is a very prolific basaltic volcano located on the southeast part of Iceland. Grimsvötn is the most frequently erupting volcano in Iceland, with the most recent eruption in 2004.

Grimsvötn Eruption in Iceland. (Photo credit- Sigurjónsson, Icelandic Met Office)

According to one source in Iceland, the eruptions have presently subsided to steam venting, though no one is prepared to say that the eruption is over. The safe distance for viewing is said to be 2 km.