Sundoro

Stratovolcano in Indonesia

Last Eruption: 1971

Key Facts

Elevation

3,149 m (10,331 ft)

Type

Stratovolcano

Location

-7.301°, 109.997°

Region

Sunda Volcanic Arc

Rock Type

Andesite / Basaltic Andesite

Tectonic Setting

Subduction zone

Location

Loading map...

Overview

Gunung Sundoro, in central Java, is located between the Dieng complex to the NW and Sumbing volcano to the SE. The large Kembang cone is about 2. 5 km from the summit on the SW flank.

A small lava dome occupies the summit crater, and numerous phreatic explosion vents are present in the summit area. Lava flows extend in all directions from the summit crater. Deposits of a large debris avalanche are located below the NE flank.

Pyroclastic-flow deposits dated at 1,720 years before present extend as far as 13 km from the summit. Recorded eruptions typically have consisted of mild-to-moderate phreatic explosions, mostly from the summit crater. Flank vents were also active in 1882 and 1903.

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

Metric	Value	Global Ranking	Significance
Total Recorded Eruptions	Unknown	Low	Moderately active volcano
Maximum VEI	VEI Unknown	Minor	Local impact potential
Recent Activity	55 years ago	Historical	Recently active

Monitoring & Alert Status

Monitoring Networks

Global Volcanism Program

International eruption database

Current Status

Normal

No recent activity. Routine monitoring continues.

Nearby Volcanoes in Sunda-Banda Volcanic Regions

Regional Volcanic Activity

The Sunda-Banda 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: 263210
•Evidence: Eruption Observed
•Epoch: Holocene

About the Photo

Farmers cultivate land on the eastern flank of Gunung Sundoro in Java. The stratovolcano immediately NW of Sumbing volcano towers 2,500 m above its base. A small lava dome occupies the summit crater, which has fed lava flows in all directions. Historical eruptions typically have consisted of mild-to-moderate phreatic explosions, mostly from the summit crater, although flank vents were also active in 1882 and 1903.

Photo by Lee Siebert, 1995 (Smithsonian Institution).