What kind of volcano is Hakone?

Hakone is classified as a Complex in Japan. Its tectonic setting is Subduction zone / Continental crust (> 25 km).

How is seismicity near Hakone 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.

Steaming fumaroles of Owakudani valley in the Hakone caldera, Japan

Photo:Lee Siebertvia Smithsonian GVP

Volcano Dossier•GVP #283020

35.23°N, 139.02°E

Erupted since 2000

Japan→

Volcano Hakone

A caldera less than 100 km from Tokyo, ringed by hot-spring towns and cradling Lake Ashi. Its steaming Owakudani valley, where eggs boiled in volcanic springs turn black, was born in an eruption about 3,000 years ago; in 2015 a small steam explosion there raised the alert level and closed the valley for months.

Last Eruption

2015

Erupted since 2000

Summit Elevation

1.4 km

Complex volcano · Andesite / Basaltic Andesite

Seismic State

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
15d ago	M2.3	59 km SW of Hachiōji (Japan)	4.1 km	0 km
29d ago	M3.4	NEAR S. COAST OF HONSHU, JAPAN (JMA)	31 km	40 km
29d ago	M3.4	神奈川県西部, Japan	31 km	40 km

Geological & Tectonic Profile

Complex volcano

Hakone is an active Complex formed in an active Subduction zone / Continental crust (> 25 km). Dominant lithology: Andesite / Basaltic Andesite.

Edifice TypeComplex volcano

Major RockAndesite / Basaltic Andesite

Tectonic SettingSubduction zone

Volcanic ArcIzu Volcanic Arc

Volcanic Dossier

VN #283020

Official catalogue parameters, coordinates, elevation and geotectonic classification.

CountryJapan

Crater Coordinates35.233°, 139.021°

Summit Elevation1.4 km

SubregionIzu Volcanic Arc

Catalog SourceSmithsonian GVP (#283020)

Authoritative Monitoring Infrastructure

All 18 Networks & VAAC →

Seismic ObservatoryJMA

Japan Meteorological Agency (Volcano Observation)

Official Portal

ICAO Aviation Ash Center

Tokyo VAAC (JMA)

Tokyo, Japan

VAAC Advisory Desk

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

Regional Seismic Profile

Tokyo & Kanto Plain

Explore live seismic monitoring, historical danger benchmarks, fault slip models and recurrence intervals for Tokyo & Kanto Plain.

Open Regional Hub

Frequently Asked Questions (FAQ)

Verified scientific, operational, and emergency protocols

The most recent eruption of Hakone recorded by the Smithsonian Global Volcanism Program was in 2015.

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