An aerial view of Turrialba volcano spewing ash in Turriaba, west of San Jose in this October 30, 2014 handout provided by the Volcanological and Seismological Observatory of Costa Rica. Costa Rica's Turrialba volcano staged its most powerful eruption in years overnight, belching a plume of gas and ash that was reported to sprinkle the capital San Jose some 50 kilometers (31 miles) away, emergency services said on Thursday. Picture taken from behind an airplane window. [Photo/Agencies]