Yokodake
Stratovolcano(es) in Japan
Key Facts
Elevation
2,480 m (8,136 ft)
Type
Stratovolcano(es)
Location
36.087°, 138.320°
Region
Northeast Japan Volcanic Arc
Rock Type
Andesite / Basaltic Andesite
Tectonic Setting
Subduction zone
Location
Loading map...
Overview
Yokodake lava dome, capped by eight small craters, has been active into the Holocene. The most recent eruption took place about 800 years ago, when ash emission accompanied emplacement of a small lava flow. Yokodake is at the northern edge of the Kita-Yatsugatake (North Yatsugatake) group of stratovolcanoes and lava domes at the NW end of the NNW-SSE-trending Yatsugatake volcanic massif.
The basaltic-to-dacitic Kita Yatsugatake group also contains the Tateshinayama, Shimagareyama, Chausuyama and Futagomine volcanoes. Tateshinayama is sometimes known as Suwa Fuji because of its conical profile. A large lava flow forms the Tateshina-kogen plateau south of Tateshinayama and Yokodake.
A debris avalanche from edifice collapse in 888 CE created Matsubara Lake on the east side of the massif.
Volcanic Hazards & Risk Assessment
Primary Hazards
Risk Level
Geological Composition & Structure
Rock Types
Tectonic Setting
Age & Formation
Eruption Statistics & Analysis
| Metric | Value | Global Ranking | Significance |
|---|---|---|---|
| Total Recorded Eruptions | Unknown | Low | Moderately active volcano |
| Maximum VEI | VEI Unknown | Minor | Local impact potential |
| Recent Activity | 826 years ago | Historical | Historically active |
Monitoring & Alert Status
Monitoring Networks
Current Status
Nearby Volcanoes in Northwestern Pacific Volcanic Regions
Quick Info
- •Smithsonian ID: 283031
- •Evidence: Eruption Dated
- •Epoch: Holocene
About the Photo
The Kita-Yatsugatake (North Yatsugatake) volcanic group is seen here from the summit of Tengudake to the south. Conical Tateshina (left-center) is a part of a group cones and lava domes at the NW end of the NNW-SSE-trending Yatsugatake volcanic massif. The broad forested slope in the foreground is Nakadake, and the flat-topped peak to the right of Tateshina is Yokodake, which last erupted about 800 years ago.
Photo by Ichio Moriya (Kanazawa University).
Authority Sources
Related Volcanoes
Basic Information
This page shows basic data from the Smithsonian Global Volcanism Program. For more detailed information, visit the official Smithsonian page.