Hakkodasan
Stratovolcano(es) in Japan
Key Facts
Elevation
1,585 m (5,200 ft)
Type
Stratovolcano(es)
Location
40.659°, 140.877°
Region
Northeast Japan Volcanic Arc
Rock Type
Andesite / Basaltic Andesite
Tectonic Setting
Subduction zone
Location
Loading map...
Overview
The basaltic-to-rhyolitic Hakkodasan volcano includes at least 17 stratovolcanoes and lava domes south of Mutsu Bay at the northern end of Honshu. The NE rim of an 8-km-wide Pleistocene caldera forms an arcuate ridge across a flat caldera-floor moat NE of the Hakkoda group volcanoes, which bury the SE caldera wall. A northern group of volcanoes, constructed within the caldera, appears to be younger than the southern group.
Hakkoda-Odake, Ido-dake, and Tsurugi-dake have well-preserved craters. Akakuradake has a 1-km-wide explosion crater breached to the north. No historical eruptions are known, although an active solfatara occurs at Idodake, and hot springs are found at several locations within the caldera.
Three minor phreatic eruptions were documented from Jigokunuma on the SW flank of Odake volcano from the 13th-17th centuries. Three soldiers on a training mission in July 1997 were killed by inhalation of volcanic gas.
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 | 476 years ago | Historical | Historically active |
Monitoring & Alert Status
Monitoring Networks
Current Status
Nearby Volcanoes in Northwestern Pacific Volcanic Regions
Quick Info
- •Smithsonian ID: 283280
- •Evidence: Eruption Dated
- •Epoch: Holocene
About the Photo
Hakkoda consists of a group of 14 cones and lava domes south of Mutsu Bay at the northern end of Honshu. The NE rim of an 8-km-wide Pleistocene caldera forms an arcuate ridge across the caldera floor to the NE of the Hakkoda group volcanoes, which bury the SE caldera wall. This view looks from the W towards the northern Akakuradake, Idodake, and Hakkodasan volcanoes seen from left to right.
Photo by Takashi Kudo, 1996 (Hokkaido 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.