Experts predict volcanic eruption
Flood water triggered by melted glacial ice is pouring from an Icelandic volcano, and scientists say it may be a precursor to an eruption.
Icelandic Meteorological Office geophysicist Gunnar Gudmundsson said that flood water is coming from the sub-glacial Grimsvotn volcano, but there are no signs of the underground tremors that would signal an eruption.
He said that could change in the next few days or months, or not at all.
Grimsvotn lies under the uninhabited Vatnajokull glacier in south-east Iceland and is the country's most active volcano. It last erupted in 2004.
Millions of air travellers were grounded in April, when ash from Iceland's Eyjafjallajokul volcano led most northern European countries to close airspace for five days.