dormant. the eruptions sent smoke and ash six miles into the air. the authorities have evacuated thousands of people who live within 12 miles of that volcano. eruptions have been so big that ash is falling into neighboring argentina. and authorities say they're expecting an even bigger explosion to happen soon. the first eruption occurred wednesday, shortly before nightfall. the second went off this morning just before sunrise, providing us with this image of volcanic lightning in action. never seen that before. it's incredible. we'll be right back.