Scientists say a more powerful Katla volcano is 'close to failure' LONDON - A second, much larger volcano in Iceland is showing signs that it may be about to erupt, scientists have warned. Since the start of the Eyjafjallajökull eruption, which caused cancellations of thousands of flights in Europe because of a giant ash cloud, there has been much speculation about neighboring Katla. An initial research paper by the University College of London Institute for Risk and Disaster Reduction Analysis of the seismic energy released around Katla over the last decade or so is interpreted as providing evidence of a...