the ash cloud from the Icelandic volcano Eyjafjallajökull reached 
the Iberian Peninsula and brought airports to a halt all over Europe. At
 the time, scientists followed its paths using satellites, laser 
detectors, sun photometers and other instruments. Two years later they 
have now presented the results and models that will help to prevent the 
consequences of such natural phenomena.
 
The eruption of the Eyjafjallajökull in the south of Iceland began 
on the 20 March, 2010. On the 14 April it began to emit a cloud of ash 
that moved towards Northern and Central Europe, resulting in the closure
 of airspace. Hundreds of planes and millions of passengers were 
grounded.
