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Merbabu

Stratovolcano in Indonesia

Last Eruption: 1797

Key Facts

Elevation

3,118 m (10,230 ft)

Type

Stratovolcano

Location

-7.454°, 110.440°

Region

Sunda Volcanic Arc

Rock Type

Basalt / Picro-Basalt

Tectonic Setting

Subduction zone

Location

Loading map...

Overview

Gunung Merbabu is a massive forested volcano north of Merapi in central Java. Three prominent radial valleys extend from the summit toward the NW, NNE, and ESE. The most recent magmatic eruptions originated from a NNW-SSE fissure system that cut across the summit and fed the large-volume Kopeng and Kajor lava flows on the N and S flanks, respectively.

Moderate explosive eruptions occurred from the summit crater in 1560 and 1797 CE.

Volcanic Hazards & Risk Assessment

Primary Hazards

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

Risk Level

Population at RiskModerate
Infrastructure RiskModerate
Aviation RiskSignificant

Geological Composition & Structure

Rock Types

Primary
Basalt / Picro-Basalt
Silica Content
Low (45-52% 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 EruptionsUnknownLowModerately active volcano
Maximum VEIVEI UnknownMinorLocal impact potential
Recent Activity229 years agoHistoricalHistorically 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: 263240
  • Evidence: Eruption Observed
  • Epoch: Holocene

About the Photo

Gunung Merbabu is seen here from the south, near the summit of Merapi. It has prominent radial valleys that extend from the summit of Merbabu towards the NW, NE, and SE. Eruptions have occurred during historical time from Merbabu from the summit crater and from a NNW-SSE fissure system that opened across the summit and fed flank lava flows.

Photo by Lee Siebert, 1995 (Smithsonian Institution).

Basic Information

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