The Turrialba volcano, located in the Costa Rican province of Cartago, about 35km southwest of San Jose, spews ash on November 1, 2014. The Turrialba volcano spew ash and volcanic rocks this morning, causing the National Institute of Emergencies to evacuate some of the people living on its slopes. Today's eruption is the largest in the last 150 years, according to OVSICORI. [Photo/Xinhua]