One of the level 3 volcanoes is Mount Sinabung which had been elevated to 4 when it began a series of eruptions on 28 August 2010. It was lowered to level 3 on 23 September, two weeks after experiencing the strongest eruption the volcano had experienced since it first erupted in August.
Mount Karangetang, another of the currently level 3 volcanoes, is one of Indonesia's most active volcanoes having erupted 41 times since 1975. An eruption on 6 August 2010 left little time for evacuation leaving 4 missing and feared dead.
Mount Ibu, the third level 3 volcano, has a lava flow running down its western slope from a parasitic cone.