From ESA (zoomed image below the read more line)
New satellite image of ash spewing from Iceland’s volcano
19 April 2010
In this image taken [at] (14:45 CET) by ESA’s Envisat satellite, a heavy plume of ash from the Eyjafjallajoekull Volcano is seen travelling in a roughly southeasterly direction.
The volcano has been emitting steam and ash since its recent eruptions began on 20 March, and as observable, the emissions continue. The plume, visible in brownish-grey, is approximately 400 km long. Envisat’s Medium Resolution Imaging Spectrometer instrument (MERIS) acquired this image on 19 April, while working in Full Resolution Mode to provide a spatial resolution of 300 m.
Here is a zoomed image