What kind of volcano is 草津白根山?

草津白根山 is classified as a Stratovolcano(es) in Japan. Its tectonic setting is Subduction zone / Continental crust (> 25 km).

How is seismicity near 草津白根山 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.

日本東京・関東平野

Turquoise acidic crater lake Yugama on Kusatsu-Shirane volcano, Japan

Photo:Lee Siebertvia Smithsonian GVP

Volcano Dossier•GVP #283120

36.62°N, 138.53°E

Erupted since 2000

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Volcano 草津白根山

有名な草津温泉の上には、世界でも有数の強酸性を示すエメラルド色の火口湖「湯釜」があります。2018年1月、数千年間静かだとみられていた本白根山がスキー場の上で前触れなく噴火し、ゴンドラや斜面で訓練中の自衛隊員に噴石が降り注ぎました。1人が死亡、11人が負傷しました。

Last Eruption

2018

Erupted since 2000

Summit Elevation

2.2 km

成層火山 · 安山岩 / 玄武岩質安山岩

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.

No catalogued earthquakes within 50 km in the last 90 days.

Geological & Tectonic Profile

成層火山

草津白根山 is an active Stratovolcano(es) formed in an active Subduction zone / Continental crust (> 25 km). Dominant lithology: Andesite / Basaltic Andesite.

Edifice Type成層火山

Major Rock安山岩 / 玄武岩質安山岩

Tectonic Setting沈み込み帯

Volcanic Arc東北日本火山弧

Volcanic Dossier

VN #283120

Official catalogue parameters, coordinates, elevation and geotectonic classification.

国日本

火口の座標36.618°, 138.528°

Summit Elevation2.2 km

Subregion東北日本火山弧

Catalog SourceSmithsonian GVP (#283120)

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 →

地域地震プロファイル

東京・関東平野

Explore live seismic monitoring, historical danger benchmarks, fault slip models and recurrence intervals for 東京・関東平野.

地域ハブを開く

よくあるご質問（FAQ）

検証済みの科学的・運用面・緊急対応プロトコル

The most recent eruption of 草津白根山 recorded by the Smithsonian Global Volcanism Program was in 2018.

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