What kind of volcano is Mont Iwate?

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

How is seismicity near Mont Iwate 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.

Snow-streaked cone of Mount Iwate rising above Morioka, Japan

Photo:Lee Siebertvia Smithsonian GVP

Volcano Dossier•GVP #283240

39.85°N, 141.00°E

Erupted in the 20th century

Japon→

Volcano Mont Iwate

Surnommé le « Fuji de Nanbu », ce cône de 2 038 m domine la ville de Morioka. Sa coulée de lave de Yakehashiri, datant de 1732, est encore si nue qu'elle est protégée comme monument naturel national, et en 1998 des essaims de séismes et le gonflement de la montagne ont fermé ses sentiers pendant des années : une alerte qui en a fait l'un des volcans les plus surveillés du Japon.

Last Eruption

1919

Erupted in the 20th century

Summit Elevation

2.0 km

Complexe volcanique · Basalte / Picrobasalte

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.

Heure	Magnitude	Épicentre / lieu	Distance	Profondeur
3d il y a	M4.3	15 km NNE of Semboku, Japan	19 km	120.4 km
56d il y a	M2.7	秋田県内陸北部, Japan	38 km	10 km
63d il y a	M3.5	EASTERN HONSHU, JAPAN (JMA)	38 km	10 km

Geological & Tectonic Profile

Complexe volcanique

Mont Iwate is an active Complex formed in an active Subduction zone / Continental crust (> 25 km). Dominant lithology: Basalt / Picro-Basalt.

Edifice TypeComplexe volcanique

Major RockBasalte / Picrobasalte

Tectonic SettingZone de subduction

Volcanic ArcArc volcanique du nord-est du Japon

Volcanic Dossier

VN #283240

Official catalogue parameters, coordinates, elevation and geotectonic classification.

PaysJapon

Coordonnées du cratère39.853°, 141.001°

Summit Elevation2.0 km

SubregionArc volcanique du nord-est du Japon

Catalog SourceSmithsonian GVP (#283240)

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 →

Profil sismique régional

Sanriku et côte du Tōhoku

Explore live seismic monitoring, historical danger benchmarks, fault slip models and recurrence intervals for Sanriku et côte du Tōhoku.

Ouvrir le pôle régional

Questions fréquentes (FAQ)

Protocoles scientifiques, opérationnels et d’urgence vérifiés

The most recent eruption of Mont Iwate recorded by the Smithsonian Global Volcanism Program was in 1919.

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