Typical eruption style: Explosive. Formation of lava domes and pyroclastic flows. Ruang volcano eruptions: 1808, 1836(?), 1840, 1856, 1870, 1871, 1874, 1889, 1904-05, 1914-15, 1949, 1996(?), 2002
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Ruang volcano is the southernmost volcano in the Sangihe Island arc, north of Sulawesi Island. The 4 x 5 km island volcano rises to 725 m across a narrow strait SW of the larger Tagulandang Island. The summit of Ruang volcano contains a crater partially filled by a lava dome initially emplaced in 1904. Explosive eruptions recorded since 1808 have often been accompanied by lava dome formation and pyroclastic flows that have damaged inhabited areas. Eruptions in 1870 and 1871 also caused fatalities.
