Villagers look toward Mount Sinabung volcano as it spews smoke in Perteguhan village, in the district of Tanah Karo, Indonesia's North Sumatra province, September 8, 2010. An Indonesian volcano that lay dormant for 400 years shot ash 5 km (3 miles) into the air on Tuesday, its biggest eruption since it became active last week, and experts warned of more blasts to come. REUTERS/Tarmizy Harva (INDONESIA - Tags: DISASTER ENVIRONMENT)