Over the weekend, we reported that Iceland’s Bardarbunga volcano, located under Europe’s largest glacier, Vatnajökull, has started to erupt with the Iceland met service warning of yet another possible pyroclastic cloud, one which will likely snarl transatlantic air traffic as happened after the 2010 eruption of Eyjafjallajokull and the 2011 smaller but just as damaging Grimsvotn volcano eruption.