🌋VolcanoAtlas

Lewotolok

Stratovolcano in Indonesia

Last Eruption: 2025

Key Facts

Elevation

1,431 m (4,695 ft)

Type

Stratovolcano

Location

-8.274°, 123.508°

Region

Sunda Volcanic Arc

Total Eruptions

11

Max VEI

VEI 3

Rock Type

Andesite / Basaltic Andesite

Tectonic Setting

Subduction zone

Location

Loading map...

Eruption Timeline

2025 CENotable

Most recent confirmed eruption

2013 CEVEI 3

Historical eruption (estimated)

1988 CEVEI 3

Historical eruption (estimated)

1978 CEVEI 2

Historical eruption (estimated)

1966 CEVEI 1

Historical eruption (estimated)

1946 CEVEI 1

Historical eruption (estimated)

1934 CEVEI 2

Historical eruption (estimated)

1922 CEVEI 2

Historical eruption (estimated)

1892 CEVEI 1

Historical eruption (estimated)

1882 CEVEI 1

Historical eruption (estimated)

1880 CEVEI 2

Historical eruption (estimated)

Overview

The Lewotolok (or Lewotolo) stratovolcano occupies the eastern end of an elongated peninsula extending north into the Flores Sea, connected to Lembata (formerly Lomblen) Island by a narrow isthmus. It is symmetrical when viewed from the north and east. A small cone with a 130-m-wide crater constructed at the SE side of a larger crater forms the volcano's high point.

Many lava flows have reached the coastline. Eruptions recorded since 1660 have consisted of explosive activity from the summit crater.

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 Eruptions11ModerateModerately active volcano
Maximum VEIVEI 3ModerateLocal impact potential
Recent Activity1 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 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: 264230
  • •Evidence: Eruption Observed
  • •Epoch: Holocene

About the Photo

Lewotolo, seen here from the Flores Sea NW of the volcano, anchors the eastern end of the northern peninsula that is connected to Lomblen Island by a narrow isthmus. Many lava flows have reached the coastline of the peninsula. Historical eruptions from Lewotolo have been recorded since 1660 and have consisted of explosive activity from the summit crater.

Photo by Rob McCaffrey, 1982 (Rensselaer Polytechnic Institute).

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.