What kind of volcano is Iwate?

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

How is seismicity near 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

Japan→

Volcano Iwate

Der als „Nanbu-Fuji“ bekannte, 2.038 m hohe Kegel überragt die Stadt Morioka. Sein Lavastrom Yakehashiri von 1732 ist bis heute so kahl, dass er als nationales Naturdenkmal geschützt ist, und 1998 sperrten Erdbebenschwärme und eine Aufwölbung des Berges seine Wanderwege für Jahre – ein Schreck, der ihn zu einem der am genauesten überwachten Vulkane Japans machte.

Last Eruption

1919

Erupted in the 20th century

Summit Elevation

2.0 km

Vulkankomplex · Basalt / Pikrobasalt

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.

Zeit	Magnitude	Epizentrum / Ort	Entfernung	Tiefe
3d her	M4.3	15 km NNE of Semboku, Japan	19 km	120.4 km
56d her	M2.7	秋田県内陸北部, Japan	38 km	10 km
63d her	M3.5	EASTERN HONSHU, JAPAN (JMA)	38 km	10 km

Geological & Tectonic Profile

Vulkankomplex

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

Edifice TypeVulkankomplex

Major RockBasalt / Pikrobasalt

Tectonic SettingSubduktionszone

Volcanic ArcVulkanbogen Nordostjapans

Volcanic Dossier

VN #283240

Official catalogue parameters, coordinates, elevation and geotectonic classification.

LandJapan

Koordinaten des Kraters39.853°, 141.001°

Summit Elevation2.0 km

SubregionVulkanbogen Nordostjapans

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 →

Regionales seismisches Profil

Sanriku & Tohoku-Küste

Explore live seismic monitoring, historical danger benchmarks, fault slip models and recurrence intervals for Sanriku & Tohoku-Küste.

Regionales Zentrum öffnen

Häufig gestellte Fragen (FAQ)

Geprüfte wissenschaftliche, operative und Notfallprotokolle

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

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