An aerial picture taken on September 14, 2014 shows a plane flying over the Bardarbunga volcano spewing lava and smoke in southeast Iceland. The Bardarbunga volcano system has been rocked by hundreds of tremors daily since mid-August, prompting fears the volcano could explode. Bardarbunga, at 2,000 metres (6,500 feet), is Iceland's second-highest peak and is located under Europe's largest glacier, Vatnajoekull. AFP PHOTO /  BERNARD MERIC        (Photo credit should read BERNARD MERIC/AFP/Getty Images)