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Ruang

Stratovolcano in Indonesia

Last Eruption: 2024

Key Facts

Elevation

703 m (2,306 ft)

Type

Stratovolcano

Location

2.306°, 125.367°

Region

Sangihe Volcanic Arc

Total Eruptions

13

Max VEI

VEI 4

Rock Type

Andesite / Basaltic Andesite

Tectonic Setting

Subduction zone

Location

Loading map...

Eruption Timeline

2024 CENotable

Most recent confirmed eruption

2009 CEVEI 2

Historical eruption (estimated)

2002 CEVEI 1

Historical eruption (estimated)

2000 CEVEI 2

Historical eruption (estimated)

1970 CEVEI 1

Historical eruption (estimated)

1963 CEVEI 3

Historical eruption (estimated)

1948 CEVEI 1

Historical eruption (estimated)

1928 CEVEI 1

Historical eruption (estimated)

1923 CEVEI 3

Historical eruption (estimated)

1911 CEVEI 2

Historical eruption (estimated)

1906 CEVEI 3

Historical eruption (estimated)

1876 CEVEI 3

Historical eruption (estimated)

1869 CEVEI 3

Historical eruption (estimated)

Overview

Ruang volcano is the southernmost volcano in the Sangihe Island arc, north of Sulawesi Island; it is not the better known Raung volcano on Java. The 4 x 5 km island volcano is across a narrow strait SW of the larger Tagulandang Island. The summit 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.

Volcanic Hazards & Risk Assessment

Primary Hazards

  • Pyroclastic flows
  • Lava flows
  • Volcanic bombs and ballistics
  • Lahars and mudflows

Risk Level

Population at RiskModerate
Infrastructure RiskHigh
Aviation RiskSignificant

Geological Composition & Structure

Rock Types

Primary
Andesite / Basaltic Andesite
Silica Content
Intermediate (57-63% SiO₂)

Tectonic Setting

Subduction zone
Formed by oceanic plate subduction, typically producing explosive eruptions due to water-rich magmas.

Age & Formation

Epoch
Holocene
Evidence
Eruption Observed

Eruption Statistics & Analysis

MetricValueGlobal RankingSignificance
Total Recorded Eruptions13ModerateModerately active volcano
Maximum VEIVEI 4MajorRegional impact potential
Recent Activity2 years agoVery RecentCurrently active

Monitoring & Alert Status

Monitoring Networks

Global Volcanism Program
International eruption database

Current Status

Active
Recent volcanic activity detected. Continuous monitoring in place.

Nearby Volcanoes in Western Pacific Volcanic Regions

Regional Volcanic Activity
The Western Pacific Volcanic Regions contains multiple active volcanic systems. Cross-regional magma interactions and tectonic stresses can influence eruption patterns across the entire arc. Monitor regional seismic activity and volcanic alerts.

Quick Info

  • •Smithsonian ID: 267010
  • •Evidence: Eruption Observed
  • •Epoch: Holocene

About the Photo

Ruang volcano, seen here from the nearby island of Tagulandang, forms a small 4 x 5 km island that is part of a chain of islands extending north from Sulawesi. Explosive eruptions, recorded in historical time since 1808, have been accompanied by pyroclastic flows and lava dome formation, and have frequently caused damage to populated areas.

Photo by Suratman (Volcanological Survey of Indonesia).

Authority Sources

Smithsonian GVP
Official volcano database
USGS Volcano Hazards
U.S. Geological Survey
Global Volcanism Program
Smithsonian Institution

Related Volcanoes

In Indonesia:
All Japan Volcanoes
105 active volcanoes
By Type:
Caldera Volcanoes
Large collapse features
By Region:
Kuril Volcanic Arc
Subduction zone volcanoes

Basic Information

This page shows basic data from the Smithsonian Global Volcanism Program. For more detailed information, visit the official Smithsonian page.