What kind of volcano is 岩手山?

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

How is seismicity near 岩手山 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

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Volcano 岩手山

这座海拔2038米的火山锥被称为“南部富士”，俯瞰着盛冈市。1732年的烧走熔岩流至今仍几乎寸草不生，被列为国家天然纪念物；1998年，密集的地震群和山体膨胀使登山道关闭多年，这次虚惊使它成为日本监测最严密的火山之一。

Last Eruption

1919

Erupted in the 20th century

Summit Elevation

2.0 km

复合火山 · 玄武岩 / 苦橄玄武岩

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.

时间	震级	震中 / 地点	距离	深度
3d 前	M4.3	15 km NNE of Semboku, Japan	19 km	120.4 km
56d 前	M2.7	秋田県内陸北部, Japan	38 km	10 km
63d 前	M3.5	EASTERN HONSHU, JAPAN (JMA)	38 km	10 km

Geological & Tectonic Profile

复合火山

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

Edifice Type复合火山

Major Rock玄武岩 / 苦橄玄武岩

Tectonic Setting俯冲带

Volcanic Arc东北日本火山弧

Volcanic Dossier

VN #283240

Official catalogue parameters, coordinates, elevation and geotectonic classification.

国家日本

火山口坐标39.853°, 141.001°

Summit Elevation2.0 km

Subregion东北日本火山弧

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 →

区域地震特征档案

三陆与东北海岸

Explore live seismic monitoring, historical danger benchmarks, fault slip models and recurrence intervals for 三陆与东北海岸.

打开区域监控中心

常见问题（FAQ）

经过验证的科学、运行与应急规程

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

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