As Iceland’s Grímsvötn volcano spews ash high into the atmosphere, satellite observations are providing essential information to advisory centres assessing the possible hazards to aviation.
Iceland Met Office: Update on volcanic activity in Grímsvötn
Institute of Earth Science, Iceland: Eruption in Grímsvötn 2011
The Official Gateway to Iceland: Volcano Report
UK Met Office: Volcanic Ash Advisory
Grimsvötn: Latest on Twitter