The UK Met Office has released a vivid series of images that show the Eyjafjallajokull volcano intensifying.
In the satellite pictures, which use infrared wavelengths, the ash plume appears bright orange and grows larger over time.
The plume gradually increased in size over a period of approximately six hours on Thursday morning.
This animation is made up of a series of 13 images captured every 30 minutes from 0600BST.
Satellite images courtesy of the Met Office.