Smoke and ash rise from the Calbuco volcano in Puerto Varas, Llanquihue province, Chile, on April 30, 2015. Southern Chile's Calbuco volcano erupted again Thursday, releasing a large column of smoke in a towering arc, just over a week after it spectacularly roared to life following half a century of inactivity, according to local press. (Xinhua/David Cortes/AGENCIAUNO)