Calbuco Volcano Spews Giant Tower of Ash in ChileChile's Calbuco volcano erupted on Wednesday, triggering a red alert and evacuations.A high column of ash and lava spews from the Calbuco volcano, on April 23. Francisco Negroni / EPAPrintApril 22, 2015, 10:57 PM UTC / Updated April 23, 2015, 12:39 AM UTC / Source: NBC News