icedsA small new fissure eruption in an ice-free area of Iceland’s Bardarbunga volcano system prompted authorities to raise their warning of the risk of ash to aviation to the highest level on Sunday. Iceland’s largest volcanic system, which cuts a 190 km long and up to 25 km wide (118 miles by 15.5 miles) swathe across the North Atlantic island, has been hit by thousands of earthquakes over the last two weeks and scientists have been on high alert. In 2010, an ash cloud from the Eyjafjallajokull volcano, in a different region of Iceland, closed much of Europe’s air space for six days. “The eruption is a very calm lava eruption and can hardly been seen on seismometers,” the Icelandic Meteorological Office said in a statement. “There is no ash, only lava,” Eggert Magnusson at the National Crisis Coordination Centre said. More