Mount Barujari (Mount Rinjani, RSOE EDIS) in West Nusa Teggara province of central Indonesia erupted on Tuesday, with ashes potentially enveloping a nearby city and disturbing international flight, a disaster agency spokesman said. The eruption took place at 14:45 local time with a column of ash rising up to 2 km in the sky, Sutopo Purwo Nugroho, spokesman of the national disaster management agency told Xinhua via phone. The ash tends to spread to southwest of the crater and fall down on the provincial capital of Mataram city and hamper flight at the Lombok international airport, Sutopo said. Authorities are preparing more than 300,000 masks for local people, he added. Indonesia, an archipelago country home to over 16,500 islands, has 129 active volcanoes.