What kind of volcano is Ruang?

Ruang is classified as a Stratovolcano in Indonesia. Its tectonic setting is Subduction zone / Oceanic crust (< 15 km).

How is seismicity near Ruang monitored here?

Earthquakes within 50 km of the crater are aggregated from 18 seismic networks and checked against a swarm rule that compares the current rate with this volcano's own 30-day background. Ash advisories come from the VAAC centres that are connected.

Volcano Dossier•GVP #267010

2.31°N, 125.37°E

Erupted since 2000

Indonesia→

Volcano Ruang

Q: When did Ruang last erupt?

The most recent eruption of Ruang recorded by the Smithsonian Global Volcanism Program was in 2024.

Q: How is seismicity near Ruang monitored here?

Earthquakes within 50 km of the crater are aggregated from 18 seismic networks and checked against a swarm rule that compares the current rate with this volcano's own 30-day background. Ash advisories come from the VAAC centres that are connected.

A small island volcano off North Sulawesi whose explosive eruptions in April 2024 sent ash more than 15 km high, forced the evacuation of the whole island and neighbouring Tagulandang, and closed Manado's airport. In 1871 an eruption here triggered a deadly tsunami.

Last eruption

2024

Erupted since 2000

Summit

0.7 km

Stratovolcano · Andesite / Basaltic Andesite

Activity

Normal Baseline

0 events (1.0x rate)

Interactive Volcano & Seismicity Map

Seismicity within 50 km radius, active VAAC ash plumes, and tectonic plate boundaries.

Recent seismicity within 50 km

0 events in the last 12 h within 25 km of the crater.

Time	Magnitude	Epicenter / Place	Distance	Depth
20d ago	M3.4	KEPULAUAN SANGIHE, INDONESIA (PIVS)	49 km	21 km
20d ago	M3.4	338 km S 07° E of Balut Island (Municipality Of Sarangani) (Davao Occidental)	49 km	21 km
76d ago	M2.7	KEPULAUAN SANGIHE, INDONESIA (BMKG)	47 km	5 km
77d ago	M3.2	KEPULAUAN SANGIHE, INDONESIA (BMKG)	30 km	158 km
88d ago	M3.6	KEPULAUAN SANGIHE, INDONESIA (BMKG)	47 km	32 km

Geological & Tectonic Profile

Stratovolcano

Ruang is an active Stratovolcano formed in an active Subduction zone / Oceanic crust (< 15 km). Dominant lithology: Andesite / Basaltic Andesite.

Edifice TypeStratovolcano

Major rockAndesite / Basaltic Andesite

TectonicsSubduction zone

Volcanic ArcSangihe Volcanic Arc

Volcano Dossier

VN #267010

Official catalogue parameters, coordinates, elevation and geotectonic classification.

CountryIndonesia

Crater Coordinates2.306°, 125.367°

Summit0.7 km

SubregionSangihe Volcanic Arc

Catalog SourceSmithsonian GVP (#267010)

Authoritative Monitoring Infrastructure

All 18 Networks & VAAC →

Seismic ObservatoryBMKG / PVMBG

Badan Meteorologi, Klimatologi, dan Geofisika / PVMBG

Official Portal

ICAO Aviation Ash Center

Darwin VAAC (Bureau of Meteorology)

Darwin, Australia

VAAC Advisory Desk

Swarm telemetry correlated across 18 networks against a 30-day baseline.Read Science & Physics →

Regional Seismic Profile

Indonesia

Explore live seismic monitoring, historical danger benchmarks, fault slip models and recurrence intervals for Indonesia.

Earthquakes in Indonesia →

Frequently Asked Questions (FAQ)

Verified scientific, operational, and emergency protocols

The most recent eruption of Ruang recorded by the Smithsonian Global Volcanism Program was in 2024.

Catalogue: Smithsonian Institution, Global Volcanism Program.Smithsonian GVP profile