Scientists from Iceland, Sweden and the Netherlands have spent months pouring over older records and also data from 2009 and 2010 prior to the eruption. They believe they can now tell the full story of how Eyjafjallajökull woke from centuries of slumber to cause the biggest disruption to European air transport since the second World War.
?If you watch a volcano for decades you can tell when it is getting restless,? stated co-author Dr Kurt Feigl of the University of Wisconsin-Madison. Parts of the dormant volcano began to swell, a sure sign that liquid rock or magma was percolating into chambers under the mountain.