Ash rises over Turrialba volcano, as seen from San Gerardo de Irazu near Turrialba, November 1, 2014. Costa Rica's Turrialba volcano staged its most powerful eruption in years, belching a plume of gas and ash that was reported to sprinkle the capital San Jose some 50 kilometers (30 miles) away, emergency services said on Thursday. REUTERS REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY)