REYKJAVIK, Iceland, April 10 (UPI) -- An Icelandic volcano even bigger than the one that shut down European air travel when it erupted in 2010 is showing signs of activity, scientists say.
While the eruption of Eyjafjallajokull left millions of travelers stranded across Europe and cost airlines an estimated $200 million a day for six days, signs of high activity beneath the much larger, neighboring Katla caldera are a possible sign of an impending eruption that could be more dangerous, Andy Hooper at the Delft University of Technology in the Netherlands said.