Ruang
Encyclopedia
Ruang is the southernmost stratovolcano
Stratovolcano
A stratovolcano, also known as a composite volcano, is a tall, conical volcano built up by many layers of hardened lava, tephra, pumice, and volcanic ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic, explosive eruptions...

 in the Sangihe Islands
Sangihe Islands
The Sangihe Islands – – are a group of islands constitute 2 regencies in northern Indonesia, the Sangihe Islands Regency & Sitaro Islands Regency...

 arc. It comprises an island 4 × 5 km wide. The summit contains a partial lava dome
Lava dome
|250px|thumb|right|Image of the [[rhyolitic]] lava dome of [[Chaitén Volcano]] during its 2008–2009 eruption.In volcanology, a lava dome is a roughly circular mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano...

. The first recorded eruption was in 1808.
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