Above, a shot of the Grímsvötn volcanic eruption as seen from the GOES-13 satellite.
Volcanic ash is affecting air travel more than officials thought it might:
Although airports remained open on Tuesday, airlines halted hundreds of flights amid safety concerns at the high density of ash caused by the eruption of the Grímsvötn volcano in Iceland. British Airways, easyJet, Ryanair, Aer Lingus, Loganair, Flybe and KLM were among carriers cancelling flights.
However, BMI was still operating out of Edinburgh and Glasgow, saying the ash remained further north than forecast earlier. The airline was constantly reviewing the situation, it said.
Also, below, the most stunning video yet of the eruption.
Video, AFTER THE JUMP...